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Finding the Fourth Proportional to 11,991.28, 16,541.76 and 7,520.08

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Solution

The fourth proportional to 11,991.28, 16,541.76 and 7,520.08 is: 10,373.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,991.28 : 16,541.76 = 7,520.08 : x
  2. Step 2: Convert to fraction form
    11,991.28/16,541.76 = 7,520.08/x
  3. Step 3: Cross multiply
    11,991.28x = 16,541.76 × 7,520.08
  4. Step 4: Simplify right side
    11,991.28x = 124,395,358.54
  5. Step 5: Solve for x
    x = 124,395,358.54/11,991.28
  6. Step 6: Final answer
    x = 10,373.82

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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.