Home / 9,159.39-12,639.11-5,180.85

Finding the Fourth Proportional to 9,159.39, 12,639.11 and 5,180.85

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Solution

The fourth proportional to 9,159.39, 12,639.11 and 5,180.85 is: 7,149.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,159.39 : 12,639.11 = 5,180.85 : x
  2. Step 2: Convert to fraction form
    9,159.39/12,639.11 = 5,180.85/x
  3. Step 3: Cross multiply
    9,159.39x = 12,639.11 × 5,180.85
  4. Step 4: Simplify right side
    9,159.39x = 65,481,307.14
  5. Step 5: Solve for x
    x = 65,481,307.14/9,159.39
  6. Step 6: Final answer
    x = 7,149.09

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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.