Home / 10,961.65-15,115.18-6,977.66

Finding the Fourth Proportional to 10,961.65, 15,115.18 and 6,977.66

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Solution

The fourth proportional to 10,961.65, 15,115.18 and 6,977.66 is: 9,621.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,961.65 : 15,115.18 = 6,977.66 : x
  2. Step 2: Convert to fraction form
    10,961.65/15,115.18 = 6,977.66/x
  3. Step 3: Cross multiply
    10,961.65x = 15,115.18 × 6,977.66
  4. Step 4: Simplify right side
    10,961.65x = 105,468,586.88
  5. Step 5: Solve for x
    x = 105,468,586.88/10,961.65
  6. Step 6: Final answer
    x = 9,621.60

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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.