Home / 20,938.97-31,403.58-6,143.91

Finding the Fourth Proportional to 20,938.97, 31,403.58 and 6,143.91

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Solution

The fourth proportional to 20,938.97, 31,403.58 and 6,143.91 is: 9,214.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,938.97 : 31,403.58 = 6,143.91 : x
  2. Step 2: Convert to fraction form
    20,938.97/31,403.58 = 6,143.91/x
  3. Step 3: Cross multiply
    20,938.97x = 31,403.58 × 6,143.91
  4. Step 4: Simplify right side
    20,938.97x = 192,940,769.20
  5. Step 5: Solve for x
    x = 192,940,769.20/20,938.97
  6. Step 6: Final answer
    x = 9,214.44

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1.5x scale

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.