Home / 12,447.40-18,671.10-4,128.70

Finding the Fourth Proportional to 12,447.40, 18,671.10 and 4,128.70

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Solution

The fourth proportional to 12,447.40, 18,671.10 and 4,128.70 is: 6,193.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,447.40 : 18,671.10 = 4,128.70 : x
  2. Step 2: Convert to fraction form
    12,447.40/18,671.10 = 4,128.70/x
  3. Step 3: Cross multiply
    12,447.40x = 18,671.10 × 4,128.70
  4. Step 4: Simplify right side
    12,447.40x = 77,087,370.57
  5. Step 5: Solve for x
    x = 77,087,370.57/12,447.40
  6. Step 6: Final answer
    x = 6,193.05

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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.