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Finding the Fourth Proportional to 18,208.81, 25,128.15 and 10,656.60

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Solution

The fourth proportional to 18,208.81, 25,128.15 and 10,656.60 is: 14,706.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,208.81 : 25,128.15 = 10,656.60 : x
  2. Step 2: Convert to fraction form
    18,208.81/25,128.15 = 10,656.60/x
  3. Step 3: Cross multiply
    18,208.81x = 25,128.15 × 10,656.60
  4. Step 4: Simplify right side
    18,208.81x = 267,780,643.29
  5. Step 5: Solve for x
    x = 267,780,643.29/18,208.81
  6. Step 6: Final answer
    x = 14,706.10

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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.