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Finding the Fourth Proportional to 9,124.47, 12,591 and 5,146.56

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Solution

The fourth proportional to 9,124.47, 12,591 and 5,146.56 is: 7,101.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,124.47 : 12,591 = 5,146.56 : x
  2. Step 2: Convert to fraction form
    9,124.47/12,591 = 5,146.56/x
  3. Step 3: Cross multiply
    9,124.47x = 12,591 × 5,146.56
  4. Step 4: Simplify right side
    9,124.47x = 64,800,336.96
  5. Step 5: Solve for x
    x = 64,800,336.96/9,124.47
  6. Step 6: Final answer
    x = 7,101.82

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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.