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Finding the Fourth Proportional to 28,537.70, 42,806.55 and 7,761.20

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Solution

The fourth proportional to 28,537.70, 42,806.55 and 7,761.20 is: 11,641.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,537.70 : 42,806.55 = 7,761.20 : x
  2. Step 2: Convert to fraction form
    28,537.70/42,806.55 = 7,761.20/x
  3. Step 3: Cross multiply
    28,537.70x = 42,806.55 × 7,761.20
  4. Step 4: Simplify right side
    28,537.70x = 332,230,195.86
  5. Step 5: Solve for x
    x = 332,230,195.86/28,537.70
  6. Step 6: Final answer
    x = 11,641.80

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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.