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Finding the Fourth Proportional to 8,739.92, 12,061.20 and 4,761.20

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Solution

The fourth proportional to 8,739.92, 12,061.20 and 4,761.20 is: 6,570.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,739.92 : 12,061.20 = 4,761.20 : x
  2. Step 2: Convert to fraction form
    8,739.92/12,061.20 = 4,761.20/x
  3. Step 3: Cross multiply
    8,739.92x = 12,061.20 × 4,761.20
  4. Step 4: Simplify right side
    8,739.92x = 57,425,785.44
  5. Step 5: Solve for x
    x = 57,425,785.44/8,739.92
  6. Step 6: Final answer
    x = 6,570.52

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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.