Home / 20,631.11-30,946.64-7,479.14

Finding the Fourth Proportional to 20,631.11, 30,946.64 and 7,479.14

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Solution

The fourth proportional to 20,631.11, 30,946.64 and 7,479.14 is: 11,218.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,631.11 : 30,946.64 = 7,479.14 : x
  2. Step 2: Convert to fraction form
    20,631.11/30,946.64 = 7,479.14/x
  3. Step 3: Cross multiply
    20,631.11x = 30,946.64 × 7,479.14
  4. Step 4: Simplify right side
    20,631.11x = 231,454,060.96
  5. Step 5: Solve for x
    x = 231,454,060.96/20,631.11
  6. Step 6: Final answer
    x = 11,218.69

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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.