Home / 12,013.66-18,020.49-5,439.70

Finding the Fourth Proportional to 12,013.66, 18,020.49 and 5,439.70

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Solution

The fourth proportional to 12,013.66, 18,020.49 and 5,439.70 is: 8,159.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,013.66 : 18,020.49 = 5,439.70 : x
  2. Step 2: Convert to fraction form
    12,013.66/18,020.49 = 5,439.70/x
  3. Step 3: Cross multiply
    12,013.66x = 18,020.49 × 5,439.70
  4. Step 4: Simplify right side
    12,013.66x = 98,026,059.45
  5. Step 5: Solve for x
    x = 98,026,059.45/12,013.66
  6. Step 6: Final answer
    x = 8,159.55

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.