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Finding the Fourth Proportional to 8,572.72, 11,826.64 and 5,737.20

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Solution

The fourth proportional to 8,572.72, 11,826.64 and 5,737.20 is: 7,914.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,572.72 : 11,826.64 = 5,737.20 : x
  2. Step 2: Convert to fraction form
    8,572.72/11,826.64 = 5,737.20/x
  3. Step 3: Cross multiply
    8,572.72x = 11,826.64 × 5,737.20
  4. Step 4: Simplify right side
    8,572.72x = 67,851,799.01
  5. Step 5: Solve for x
    x = 67,851,799.01/8,572.72
  6. Step 6: Final answer
    x = 7,914.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.