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Finding the Fourth Proportional to 28,428, 39,229.80 and 16,490.52

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Solution

The fourth proportional to 28,428, 39,229.80 and 16,490.52 is: 22,756.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,428 : 39,229.80 = 16,490.52 : x
  2. Step 2: Convert to fraction form
    28,428/39,229.80 = 16,490.52/x
  3. Step 3: Cross multiply
    28,428x = 39,229.80 × 16,490.52
  4. Step 4: Simplify right side
    28,428x = 646,919,801.50
  5. Step 5: Solve for x
    x = 646,919,801.50/28,428
  6. Step 6: Final answer
    x = 22,756.43

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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.