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Finding the Fourth Proportional to 15,132.88, 20,881.56 and 8,416.82

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Solution

The fourth proportional to 15,132.88, 20,881.56 and 8,416.82 is: 11,614.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,132.88 : 20,881.56 = 8,416.82 : x
  2. Step 2: Convert to fraction form
    15,132.88/20,881.56 = 8,416.82/x
  3. Step 3: Cross multiply
    15,132.88x = 20,881.56 × 8,416.82
  4. Step 4: Simplify right side
    15,132.88x = 175,756,331.84
  5. Step 5: Solve for x
    x = 175,756,331.84/15,132.88
  6. Step 6: Final answer
    x = 11,614.20

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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.