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Finding the Fourth Proportional to 13,398.88, 20,080.88 and 7,475.52

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Solution

The fourth proportional to 13,398.88, 20,080.88 and 7,475.52 is: 11,203.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,398.88 : 20,080.88 = 7,475.52 : x
  2. Step 2: Convert to fraction form
    13,398.88/20,080.88 = 7,475.52/x
  3. Step 3: Cross multiply
    13,398.88x = 20,080.88 × 7,475.52
  4. Step 4: Simplify right side
    13,398.88x = 150,115,020.06
  5. Step 5: Solve for x
    x = 150,115,020.06/13,398.88
  6. Step 6: Final answer
    x = 11,203.55

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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.