Home / 8,780.90-13,171.33-3,158.56

Finding the Fourth Proportional to 8,780.90, 13,171.33 and 3,158.56

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Solution

The fourth proportional to 8,780.90, 13,171.33 and 3,158.56 is: 4,737.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,780.90 : 13,171.33 = 3,158.56 : x
  2. Step 2: Convert to fraction form
    8,780.90/13,171.33 = 3,158.56/x
  3. Step 3: Cross multiply
    8,780.90x = 13,171.33 × 3,158.56
  4. Step 4: Simplify right side
    8,780.90x = 41,602,475.77
  5. Step 5: Solve for x
    x = 41,602,475.77/8,780.90
  6. Step 6: Final answer
    x = 4,737.84

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.