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Finding the Fourth Proportional to 18,642.19, 25,726.12 and 10,684.21

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Solution

The fourth proportional to 18,642.19, 25,726.12 and 10,684.21 is: 14,744.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,642.19 : 25,726.12 = 10,684.21 : x
  2. Step 2: Convert to fraction form
    18,642.19/25,726.12 = 10,684.21/x
  3. Step 3: Cross multiply
    18,642.19x = 25,726.12 × 10,684.21
  4. Step 4: Simplify right side
    18,642.19x = 274,863,268.57
  5. Step 5: Solve for x
    x = 274,863,268.57/18,642.19
  6. Step 6: Final answer
    x = 14,744.15

Related Problems

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Half scale
Find fourth proportional to 37,284.38, 51,452.24 and 21,368.42
Double scale
Find fourth proportional to 18,643.19, 25,727.50 and 10,685.21
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.