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Finding the Fourth Proportional to 11,891.46, 17,820.79 and 8,966.55

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Solution

The fourth proportional to 11,891.46, 17,820.79 and 8,966.55 is: 13,437.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,891.46 : 17,820.79 = 8,966.55 : x
  2. Step 2: Convert to fraction form
    11,891.46/17,820.79 = 8,966.55/x
  3. Step 3: Cross multiply
    11,891.46x = 17,820.79 × 8,966.55
  4. Step 4: Simplify right side
    11,891.46x = 159,791,004.57
  5. Step 5: Solve for x
    x = 159,791,004.57/11,891.46
  6. Step 6: Final answer
    x = 13,437.46

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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.