Home / 21,034.20-31,535.60-12,712.34

Finding the Fourth Proportional to 21,034.20, 31,535.60 and 12,712.34

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Solution

The fourth proportional to 21,034.20, 31,535.60 and 12,712.34 is: 19,059.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,034.20 : 31,535.60 = 12,712.34 : x
  2. Step 2: Convert to fraction form
    21,034.20/31,535.60 = 12,712.34/x
  3. Step 3: Cross multiply
    21,034.20x = 31,535.60 × 12,712.34
  4. Step 4: Simplify right side
    21,034.20x = 400,891,269.30
  5. Step 5: Solve for x
    x = 400,891,269.30/21,034.20
  6. Step 6: Final answer
    x = 19,059.02

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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.