Home / 20,834.78-31,215.71-17,347.20

Finding the Fourth Proportional to 20,834.78, 31,215.71 and 17,347.20

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Solution

The fourth proportional to 20,834.78, 31,215.71 and 17,347.20 is: 25,990.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,834.78 : 31,215.71 = 17,347.20 : x
  2. Step 2: Convert to fraction form
    20,834.78/31,215.71 = 17,347.20/x
  3. Step 3: Cross multiply
    20,834.78x = 31,215.71 × 17,347.20
  4. Step 4: Simplify right side
    20,834.78x = 541,505,077.78
  5. Step 5: Solve for x
    x = 541,505,077.78/20,834.78
  6. Step 6: Final answer
    x = 25,990.45

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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.