Home / 20,402.52-28,171.80-13,694.16

Finding the Fourth Proportional to 20,402.52, 28,171.80 and 13,694.16

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Solution

The fourth proportional to 20,402.52, 28,171.80 and 13,694.16 is: 18,908.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,402.52 : 28,171.80 = 13,694.16 : x
  2. Step 2: Convert to fraction form
    20,402.52/28,171.80 = 13,694.16/x
  3. Step 3: Cross multiply
    20,402.52x = 28,171.80 × 13,694.16
  4. Step 4: Simplify right side
    20,402.52x = 385,789,136.69
  5. Step 5: Solve for x
    x = 385,789,136.69/20,402.52
  6. Step 6: Final answer
    x = 18,908.90

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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.