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Finding the Fourth Proportional to 9,129.87, 13,700.88 and 4,750.40

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Solution

The fourth proportional to 9,129.87, 13,700.88 and 4,750.40 is: 7,128.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,129.87 : 13,700.88 = 4,750.40 : x
  2. Step 2: Convert to fraction form
    9,129.87/13,700.88 = 4,750.40/x
  3. Step 3: Cross multiply
    9,129.87x = 13,700.88 × 4,750.40
  4. Step 4: Simplify right side
    9,129.87x = 65,084,694.60
  5. Step 5: Solve for x
    x = 65,084,694.60/9,129.87
  6. Step 6: Final answer
    x = 7,128.76

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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.