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Finding the Fourth Proportional to 8,739.76, 12,062.12 and 5,202.88

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Solution

The fourth proportional to 8,739.76, 12,062.12 and 5,202.88 is: 7,180.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,739.76 : 12,062.12 = 5,202.88 : x
  2. Step 2: Convert to fraction form
    8,739.76/12,062.12 = 5,202.88/x
  3. Step 3: Cross multiply
    8,739.76x = 12,062.12 × 5,202.88
  4. Step 4: Simplify right side
    8,739.76x = 62,757,762.91
  5. Step 5: Solve for x
    x = 62,757,762.91/8,739.76
  6. Step 6: Final answer
    x = 7,180.72

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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.