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Finding the Fourth Proportional to 15,242.76, 20,988.24 and 13,343.73

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Solution

The fourth proportional to 15,242.76, 20,988.24 and 13,343.73 is: 18,373.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,242.76 : 20,988.24 = 13,343.73 : x
  2. Step 2: Convert to fraction form
    15,242.76/20,988.24 = 13,343.73/x
  3. Step 3: Cross multiply
    15,242.76x = 20,988.24 × 13,343.73
  4. Step 4: Simplify right side
    15,242.76x = 280,061,407.74
  5. Step 5: Solve for x
    x = 280,061,407.74/15,242.76
  6. Step 6: Final answer
    x = 18,373.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.