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Finding the Fourth Proportional to 13,339.20, 20,008.80 and 10,747.20

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Solution

The fourth proportional to 13,339.20, 20,008.80 and 10,747.20 is: 16,120.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,339.20 : 20,008.80 = 10,747.20 : x
  2. Step 2: Convert to fraction form
    13,339.20/20,008.80 = 10,747.20/x
  3. Step 3: Cross multiply
    13,339.20x = 20,008.80 × 10,747.20
  4. Step 4: Simplify right side
    13,339.20x = 215,038,575.36
  5. Step 5: Solve for x
    x = 215,038,575.36/13,339.20
  6. Step 6: Final answer
    x = 16,120.80

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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.