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Finding the Fourth Proportional to 28,311.28, 42,466.76 and 7,251.28

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Solution

The fourth proportional to 28,311.28, 42,466.76 and 7,251.28 is: 10,876.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,311.28 : 42,466.76 = 7,251.28 : x
  2. Step 2: Convert to fraction form
    28,311.28/42,466.76 = 7,251.28/x
  3. Step 3: Cross multiply
    28,311.28x = 42,466.76 × 7,251.28
  4. Step 4: Simplify right side
    28,311.28x = 307,938,367.45
  5. Step 5: Solve for x
    x = 307,938,367.45/28,311.28
  6. Step 6: Final answer
    x = 10,876.88

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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.