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Finding the Fourth Proportional to 8,460.39, 12,691.80 and 2,615.63

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Solution

The fourth proportional to 8,460.39, 12,691.80 and 2,615.63 is: 3,923.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,460.39 : 12,691.80 = 2,615.63 : x
  2. Step 2: Convert to fraction form
    8,460.39/12,691.80 = 2,615.63/x
  3. Step 3: Cross multiply
    8,460.39x = 12,691.80 × 2,615.63
  4. Step 4: Simplify right side
    8,460.39x = 33,197,084.56
  5. Step 5: Solve for x
    x = 33,197,084.56/8,460.39
  6. Step 6: Final answer
    x = 3,923.82

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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.