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Finding the Fourth Proportional to 28,292.76, 42,439.20 and 7,516.20

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Solution

The fourth proportional to 28,292.76, 42,439.20 and 7,516.20 is: 11,274.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,292.76 : 42,439.20 = 7,516.20 : x
  2. Step 2: Convert to fraction form
    28,292.76/42,439.20 = 7,516.20/x
  3. Step 3: Cross multiply
    28,292.76x = 42,439.20 × 7,516.20
  4. Step 4: Simplify right side
    28,292.76x = 318,981,515.04
  5. Step 5: Solve for x
    x = 318,981,515.04/28,292.76
  6. Step 6: Final answer
    x = 11,274.32

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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.