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Finding the Fourth Proportional to 7,129.80, 10,697.13 and 6,318.18

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Solution

The fourth proportional to 7,129.80, 10,697.13 and 6,318.18 is: 9,479.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,129.80 : 10,697.13 = 6,318.18 : x
  2. Step 2: Convert to fraction form
    7,129.80/10,697.13 = 6,318.18/x
  3. Step 3: Cross multiply
    7,129.80x = 10,697.13 × 6,318.18
  4. Step 4: Simplify right side
    7,129.80x = 67,586,392.82
  5. Step 5: Solve for x
    x = 67,586,392.82/7,129.80
  6. Step 6: Final answer
    x = 9,479.42

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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.