Home / 13,213.60-19,820.40-12,338.80

Finding the Fourth Proportional to 13,213.60, 19,820.40 and 12,338.80

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Solution

The fourth proportional to 13,213.60, 19,820.40 and 12,338.80 is: 18,508.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,213.60 : 19,820.40 = 12,338.80 : x
  2. Step 2: Convert to fraction form
    13,213.60/19,820.40 = 12,338.80/x
  3. Step 3: Cross multiply
    13,213.60x = 19,820.40 × 12,338.80
  4. Step 4: Simplify right side
    13,213.60x = 244,559,951.52
  5. Step 5: Solve for x
    x = 244,559,951.52/13,213.60
  6. Step 6: Final answer
    x = 18,508.20

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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.