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Finding the Fourth Proportional to 15,154.88, 20,914.13 and 8,440.79

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Solution

The fourth proportional to 15,154.88, 20,914.13 and 8,440.79 is: 11,648.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,154.88 : 20,914.13 = 8,440.79 : x
  2. Step 2: Convert to fraction form
    15,154.88/20,914.13 = 8,440.79/x
  3. Step 3: Cross multiply
    15,154.88x = 20,914.13 × 8,440.79
  4. Step 4: Simplify right side
    15,154.88x = 176,531,695.89
  5. Step 5: Solve for x
    x = 176,531,695.89/15,154.88
  6. Step 6: Final answer
    x = 11,648.51

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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.