Home / 20,676.25-31,030.05-15,143.95

Finding the Fourth Proportional to 20,676.25, 31,030.05 and 15,143.95

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Solution

The fourth proportional to 20,676.25, 31,030.05 and 15,143.95 is: 22,727.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,676.25 : 31,030.05 = 15,143.95 : x
  2. Step 2: Convert to fraction form
    20,676.25/31,030.05 = 15,143.95/x
  3. Step 3: Cross multiply
    20,676.25x = 31,030.05 × 15,143.95
  4. Step 4: Simplify right side
    20,676.25x = 469,917,370.55
  5. Step 5: Solve for x
    x = 469,917,370.55/20,676.25
  6. Step 6: Final answer
    x = 22,727.40

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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.