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Finding the Fourth Proportional to 28,572.60, 42,854.04 and 7,791.24

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Solution

The fourth proportional to 28,572.60, 42,854.04 and 7,791.24 is: 11,685.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,572.60 : 42,854.04 = 7,791.24 : x
  2. Step 2: Convert to fraction form
    28,572.60/42,854.04 = 7,791.24/x
  3. Step 3: Cross multiply
    28,572.60x = 42,854.04 × 7,791.24
  4. Step 4: Simplify right side
    28,572.60x = 333,886,110.61
  5. Step 5: Solve for x
    x = 333,886,110.61/28,572.60
  6. Step 6: Final answer
    x = 11,685.53

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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.