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Finding the Fourth Proportional to 10,990.76, 15,165.06 and 6,517.88

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Solution

The fourth proportional to 10,990.76, 15,165.06 and 6,517.88 is: 8,993.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,990.76 : 15,165.06 = 6,517.88 : x
  2. Step 2: Convert to fraction form
    10,990.76/15,165.06 = 6,517.88/x
  3. Step 3: Cross multiply
    10,990.76x = 15,165.06 × 6,517.88
  4. Step 4: Simplify right side
    10,990.76x = 98,844,041.27
  5. Step 5: Solve for x
    x = 98,844,041.27/10,990.76
  6. Step 6: Final answer
    x = 8,993.38

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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.