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Finding the Fourth Proportional to 8,789.53, 12,129.19 and 5,254.69

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Solution

The fourth proportional to 8,789.53, 12,129.19 and 5,254.69 is: 7,251.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,789.53 : 12,129.19 = 5,254.69 : x
  2. Step 2: Convert to fraction form
    8,789.53/12,129.19 = 5,254.69/x
  3. Step 3: Cross multiply
    8,789.53x = 12,129.19 × 5,254.69
  4. Step 4: Simplify right side
    8,789.53x = 63,735,133.40
  5. Step 5: Solve for x
    x = 63,735,133.40/8,789.53
  6. Step 6: Final answer
    x = 7,251.26

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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.