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Finding the Fourth Proportional to 28,503.31, 42,755.70 and 13,506.91

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Solution

The fourth proportional to 28,503.31, 42,755.70 and 13,506.91 is: 20,260.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,503.31 : 42,755.70 = 13,506.91 : x
  2. Step 2: Convert to fraction form
    28,503.31/42,755.70 = 13,506.91/x
  3. Step 3: Cross multiply
    28,503.31x = 42,755.70 × 13,506.91
  4. Step 4: Simplify right side
    28,503.31x = 577,497,391.89
  5. Step 5: Solve for x
    x = 577,497,391.89/28,503.31
  6. Step 6: Final answer
    x = 20,260.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.