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Finding the Fourth Proportional to 28,806, 39,752.28 and 16,231.20

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Solution

The fourth proportional to 28,806, 39,752.28 and 16,231.20 is: 22,399.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,806 : 39,752.28 = 16,231.20 : x
  2. Step 2: Convert to fraction form
    28,806/39,752.28 = 16,231.20/x
  3. Step 3: Cross multiply
    28,806x = 39,752.28 × 16,231.20
  4. Step 4: Simplify right side
    28,806x = 645,227,207.14
  5. Step 5: Solve for x
    x = 645,227,207.14/28,806
  6. Step 6: Final answer
    x = 22,399.06

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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.