Home / 12,013.72-18,020.58-5,439.76

Finding the Fourth Proportional to 12,013.72, 18,020.58 and 5,439.76

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Solution

The fourth proportional to 12,013.72, 18,020.58 and 5,439.76 is: 8,159.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,013.72 : 18,020.58 = 5,439.76 : x
  2. Step 2: Convert to fraction form
    12,013.72/18,020.58 = 5,439.76/x
  3. Step 3: Cross multiply
    12,013.72x = 18,020.58 × 5,439.76
  4. Step 4: Simplify right side
    12,013.72x = 98,027,630.26
  5. Step 5: Solve for x
    x = 98,027,630.26/12,013.72
  6. Step 6: Final answer
    x = 8,159.64

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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.