Home / 9,108.66-12,569.05-5,129.70

Finding the Fourth Proportional to 9,108.66, 12,569.05 and 5,129.70

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Solution

The fourth proportional to 9,108.66, 12,569.05 and 5,129.70 is: 7,078.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,108.66 : 12,569.05 = 5,129.70 : x
  2. Step 2: Convert to fraction form
    9,108.66/12,569.05 = 5,129.70/x
  3. Step 3: Cross multiply
    9,108.66x = 12,569.05 × 5,129.70
  4. Step 4: Simplify right side
    9,108.66x = 64,475,455.79
  5. Step 5: Solve for x
    x = 64,475,455.79/9,108.66
  6. Step 6: Final answer
    x = 7,078.48

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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.