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Finding the Fourth Proportional to 28,972.72, 43,465.20 and 9,248.80

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Solution

The fourth proportional to 28,972.72, 43,465.20 and 9,248.80 is: 13,875.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,972.72 : 43,465.20 = 9,248.80 : x
  2. Step 2: Convert to fraction form
    28,972.72/43,465.20 = 9,248.80/x
  3. Step 3: Cross multiply
    28,972.72x = 43,465.20 × 9,248.80
  4. Step 4: Simplify right side
    28,972.72x = 402,000,941.76
  5. Step 5: Solve for x
    x = 402,000,941.76/28,972.72
  6. Step 6: Final answer
    x = 13,875.15

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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.