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Finding the Fourth Proportional to 9,901.81, 13,664.11 and 5,920.56

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Solution

The fourth proportional to 9,901.81, 13,664.11 and 5,920.56 is: 8,170.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,901.81 : 13,664.11 = 5,920.56 : x
  2. Step 2: Convert to fraction form
    9,901.81/13,664.11 = 5,920.56/x
  3. Step 3: Cross multiply
    9,901.81x = 13,664.11 × 5,920.56
  4. Step 4: Simplify right side
    9,901.81x = 80,899,183.10
  5. Step 5: Solve for x
    x = 80,899,183.10/9,901.81
  6. Step 6: Final answer
    x = 8,170.14

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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.