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Finding the Fourth Proportional to 7,128.59, 10,679.05 and 4,655.92

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Solution

The fourth proportional to 7,128.59, 10,679.05 and 4,655.92 is: 6,974.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,128.59 : 10,679.05 = 4,655.92 : x
  2. Step 2: Convert to fraction form
    7,128.59/10,679.05 = 4,655.92/x
  3. Step 3: Cross multiply
    7,128.59x = 10,679.05 × 4,655.92
  4. Step 4: Simplify right side
    7,128.59x = 49,720,793.15
  5. Step 5: Solve for x
    x = 49,720,793.15/7,128.59
  6. Step 6: Final answer
    x = 6,974.84

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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.