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Finding the Fourth Proportional to 28,602.91, 39,470.03 and 15,855.97

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Solution

The fourth proportional to 28,602.91, 39,470.03 and 15,855.97 is: 21,880.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,602.91 : 39,470.03 = 15,855.97 : x
  2. Step 2: Convert to fraction form
    28,602.91/39,470.03 = 15,855.97/x
  3. Step 3: Cross multiply
    28,602.91x = 39,470.03 × 15,855.97
  4. Step 4: Simplify right side
    28,602.91x = 625,835,532.30
  5. Step 5: Solve for x
    x = 625,835,532.30/28,602.91
  6. Step 6: Final answer
    x = 21,880.14

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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.