Home / 10,956.12-15,121.18-6,979

Finding the Fourth Proportional to 10,956.12, 15,121.18 and 6,979

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Solution

The fourth proportional to 10,956.12, 15,121.18 and 6,979 is: 9,632.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,956.12 : 15,121.18 = 6,979 : x
  2. Step 2: Convert to fraction form
    10,956.12/15,121.18 = 6,979/x
  3. Step 3: Cross multiply
    10,956.12x = 15,121.18 × 6,979
  4. Step 4: Simplify right side
    10,956.12x = 105,530,715.22
  5. Step 5: Solve for x
    x = 105,530,715.22/10,956.12
  6. Step 6: Final answer
    x = 9,632.12

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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.