Home / 13,381.60-20,072.40-8,456.80

Finding the Fourth Proportional to 13,381.60, 20,072.40 and 8,456.80

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Solution

The fourth proportional to 13,381.60, 20,072.40 and 8,456.80 is: 12,685.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,381.60 : 20,072.40 = 8,456.80 : x
  2. Step 2: Convert to fraction form
    13,381.60/20,072.40 = 8,456.80/x
  3. Step 3: Cross multiply
    13,381.60x = 20,072.40 × 8,456.80
  4. Step 4: Simplify right side
    13,381.60x = 169,748,272.32
  5. Step 5: Solve for x
    x = 169,748,272.32/13,381.60
  6. Step 6: Final answer
    x = 12,685.20

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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.