Home / 13,948.60-20,939.10-8,408.20

Finding the Fourth Proportional to 13,948.60, 20,939.10 and 8,408.20

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Solution

The fourth proportional to 13,948.60, 20,939.10 and 8,408.20 is: 12,622.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,948.60 : 20,939.10 = 8,408.20 : x
  2. Step 2: Convert to fraction form
    13,948.60/20,939.10 = 8,408.20/x
  3. Step 3: Cross multiply
    13,948.60x = 20,939.10 × 8,408.20
  4. Step 4: Simplify right side
    13,948.60x = 176,060,140.62
  5. Step 5: Solve for x
    x = 176,060,140.62/13,948.60
  6. Step 6: Final answer
    x = 12,622.07

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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.