Home / 9,108.09-12,569.02-5,129.19

Finding the Fourth Proportional to 9,108.09, 12,569.02 and 5,129.19

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Solution

The fourth proportional to 9,108.09, 12,569.02 and 5,129.19 is: 7,078.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,108.09 : 12,569.02 = 5,129.19 : x
  2. Step 2: Convert to fraction form
    9,108.09/12,569.02 = 5,129.19/x
  3. Step 3: Cross multiply
    9,108.09x = 12,569.02 × 5,129.19
  4. Step 4: Simplify right side
    9,108.09x = 64,468,891.69
  5. Step 5: Solve for x
    x = 64,468,891.69/9,108.09
  6. Step 6: Final answer
    x = 7,078.20

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Half scale
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Double scale
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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.