Home / 13,631.40-20,459.10-8,077.80

Finding the Fourth Proportional to 13,631.40, 20,459.10 and 8,077.80

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Solution

The fourth proportional to 13,631.40, 20,459.10 and 8,077.80 is: 12,123.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,631.40 : 20,459.10 = 8,077.80 : x
  2. Step 2: Convert to fraction form
    13,631.40/20,459.10 = 8,077.80/x
  3. Step 3: Cross multiply
    13,631.40x = 20,459.10 × 8,077.80
  4. Step 4: Simplify right side
    13,631.40x = 165,264,517.98
  5. Step 5: Solve for x
    x = 165,264,517.98/13,631.40
  6. Step 6: Final answer
    x = 12,123.81

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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.