Home / 12,342.08-18,513.12-4,139.84

Finding the Fourth Proportional to 12,342.08, 18,513.12 and 4,139.84

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Solution

The fourth proportional to 12,342.08, 18,513.12 and 4,139.84 is: 6,209.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,342.08 : 18,513.12 = 4,139.84 : x
  2. Step 2: Convert to fraction form
    12,342.08/18,513.12 = 4,139.84/x
  3. Step 3: Cross multiply
    12,342.08x = 18,513.12 × 4,139.84
  4. Step 4: Simplify right side
    12,342.08x = 76,641,354.70
  5. Step 5: Solve for x
    x = 76,641,354.70/12,342.08
  6. Step 6: Final answer
    x = 6,209.76

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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.