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Finding the Fourth Proportional to 9,129.87, 12,597.79 and 5,150.91

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Solution

The fourth proportional to 9,129.87, 12,597.79 and 5,150.91 is: 7,107.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,129.87 : 12,597.79 = 5,150.91 : x
  2. Step 2: Convert to fraction form
    9,129.87/12,597.79 = 5,150.91/x
  3. Step 3: Cross multiply
    9,129.87x = 12,597.79 × 5,150.91
  4. Step 4: Simplify right side
    9,129.87x = 64,890,082.49
  5. Step 5: Solve for x
    x = 64,890,082.49/9,129.87
  6. Step 6: Final answer
    x = 7,107.45

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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.