Home / 28,032.28-38,685-15,456.28

Finding the Fourth Proportional to 28,032.28, 38,685 and 15,456.28

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Solution

The fourth proportional to 28,032.28, 38,685 and 15,456.28 is: 21,329.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,032.28 : 38,685 = 15,456.28 : x
  2. Step 2: Convert to fraction form
    28,032.28/38,685 = 15,456.28/x
  3. Step 3: Cross multiply
    28,032.28x = 38,685 × 15,456.28
  4. Step 4: Simplify right side
    28,032.28x = 597,926,191.80
  5. Step 5: Solve for x
    x = 597,926,191.80/28,032.28
  6. Step 6: Final answer
    x = 21,329.92

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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.