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Finding the Fourth Proportional to 10,901.81, 15,015.84 and 8,379.10

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Solution

The fourth proportional to 10,901.81, 15,015.84 and 8,379.10 is: 11,541.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,901.81 : 15,015.84 = 8,379.10 : x
  2. Step 2: Convert to fraction form
    10,901.81/15,015.84 = 8,379.10/x
  3. Step 3: Cross multiply
    10,901.81x = 15,015.84 × 8,379.10
  4. Step 4: Simplify right side
    10,901.81x = 125,819,149.86
  5. Step 5: Solve for x
    x = 125,819,149.86/10,901.81
  6. Step 6: Final answer
    x = 11,541.12

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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.