Home / 9,108.06-12,569-5,129.58

Finding the Fourth Proportional to 9,108.06, 12,569 and 5,129.58

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Solution

The fourth proportional to 9,108.06, 12,569 and 5,129.58 is: 7,078.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,108.06 : 12,569 = 5,129.58 : x
  2. Step 2: Convert to fraction form
    9,108.06/12,569 = 5,129.58/x
  3. Step 3: Cross multiply
    9,108.06x = 12,569 × 5,129.58
  4. Step 4: Simplify right side
    9,108.06x = 64,473,691.02
  5. Step 5: Solve for x
    x = 64,473,691.02/9,108.06
  6. Step 6: Final answer
    x = 7,078.75

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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.