Home / 21,218.58-29,265.21-15,551.19

Finding the Fourth Proportional to 21,218.58, 29,265.21 and 15,551.19

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Solution

The fourth proportional to 21,218.58, 29,265.21 and 15,551.19 is: 21,448.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,218.58 : 29,265.21 = 15,551.19 : x
  2. Step 2: Convert to fraction form
    21,218.58/29,265.21 = 15,551.19/x
  3. Step 3: Cross multiply
    21,218.58x = 29,265.21 × 15,551.19
  4. Step 4: Simplify right side
    21,218.58x = 455,108,841.10
  5. Step 5: Solve for x
    x = 455,108,841.10/21,218.58
  6. Step 6: Final answer
    x = 21,448.60

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Half scale
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Double scale
Find fourth proportional to 21,219.58, 29,266.59 and 15,552.19
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.