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Finding the Fourth Proportional to 10,871.88, 15,005.88 and 6,158.94

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Solution

The fourth proportional to 10,871.88, 15,005.88 and 6,158.94 is: 8,500.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,871.88 : 15,005.88 = 6,158.94 : x
  2. Step 2: Convert to fraction form
    10,871.88/15,005.88 = 6,158.94/x
  3. Step 3: Cross multiply
    10,871.88x = 15,005.88 × 6,158.94
  4. Step 4: Simplify right side
    10,871.88x = 92,420,314.57
  5. Step 5: Solve for x
    x = 92,420,314.57/10,871.88
  6. Step 6: Final answer
    x = 8,500.86

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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.