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Finding the Fourth Proportional to 28,972.27, 39,978.52 and 17,658.19

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Solution

The fourth proportional to 28,972.27, 39,978.52 and 17,658.19 is: 24,366.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,972.27 : 39,978.52 = 17,658.19 : x
  2. Step 2: Convert to fraction form
    28,972.27/39,978.52 = 17,658.19/x
  3. Step 3: Cross multiply
    28,972.27x = 39,978.52 × 17,658.19
  4. Step 4: Simplify right side
    28,972.27x = 705,948,302.08
  5. Step 5: Solve for x
    x = 705,948,302.08/28,972.27
  6. Step 6: Final answer
    x = 24,366.34

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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.