Home / 20,898.68-31,339.31-7,743.87

Finding the Fourth Proportional to 20,898.68, 31,339.31 and 7,743.87

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Solution

The fourth proportional to 20,898.68, 31,339.31 and 7,743.87 is: 11,612.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,898.68 : 31,339.31 = 7,743.87 : x
  2. Step 2: Convert to fraction form
    20,898.68/31,339.31 = 7,743.87/x
  3. Step 3: Cross multiply
    20,898.68x = 31,339.31 × 7,743.87
  4. Step 4: Simplify right side
    20,898.68x = 242,687,503.81
  5. Step 5: Solve for x
    x = 242,687,503.81/20,898.68
  6. Step 6: Final answer
    x = 11,612.58

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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.