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Finding the Fourth Proportional to 10,871.20, 15,002.22 and 6,155.56

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Solution

The fourth proportional to 10,871.20, 15,002.22 and 6,155.56 is: 8,494.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,871.20 : 15,002.22 = 6,155.56 : x
  2. Step 2: Convert to fraction form
    10,871.20/15,002.22 = 6,155.56/x
  3. Step 3: Cross multiply
    10,871.20x = 15,002.22 × 6,155.56
  4. Step 4: Simplify right side
    10,871.20x = 92,347,065.34
  5. Step 5: Solve for x
    x = 92,347,065.34/10,871.20
  6. Step 6: Final answer
    x = 8,494.65

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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.