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Finding the Fourth Proportional to 10,991.50, 15,168.28 and 6,275.68

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Solution

The fourth proportional to 10,991.50, 15,168.28 and 6,275.68 is: 8,660.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,991.50 : 15,168.28 = 6,275.68 : x
  2. Step 2: Convert to fraction form
    10,991.50/15,168.28 = 6,275.68/x
  3. Step 3: Cross multiply
    10,991.50x = 15,168.28 × 6,275.68
  4. Step 4: Simplify right side
    10,991.50x = 95,191,271.43
  5. Step 5: Solve for x
    x = 95,191,271.43/10,991.50
  6. Step 6: Final answer
    x = 8,660.44

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.