Home / 20,869.11-31,303.62-5,286.69

Finding the Fourth Proportional to 20,869.11, 31,303.62 and 5,286.69

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Solution

The fourth proportional to 20,869.11, 31,303.62 and 5,286.69 is: 7,930.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,869.11 : 31,303.62 = 5,286.69 : x
  2. Step 2: Convert to fraction form
    20,869.11/31,303.62 = 5,286.69/x
  3. Step 3: Cross multiply
    20,869.11x = 31,303.62 × 5,286.69
  4. Step 4: Simplify right side
    20,869.11x = 165,492,534.82
  5. Step 5: Solve for x
    x = 165,492,534.82/20,869.11
  6. Step 6: Final answer
    x = 7,930.02

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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.