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Finding the Fourth Proportional to 20,292.40, 30,424.24 and 6,959

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Solution

The fourth proportional to 20,292.40, 30,424.24 and 6,959 is: 10,433.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,292.40 : 30,424.24 = 6,959 : x
  2. Step 2: Convert to fraction form
    20,292.40/30,424.24 = 6,959/x
  3. Step 3: Cross multiply
    20,292.40x = 30,424.24 × 6,959
  4. Step 4: Simplify right side
    20,292.40x = 211,722,286.16
  5. Step 5: Solve for x
    x = 211,722,286.16/20,292.40
  6. Step 6: Final answer
    x = 10,433.58

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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.