Home / 20,675.75-31,029.30-15,143.45

Finding the Fourth Proportional to 20,675.75, 31,029.30 and 15,143.45

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Solution

The fourth proportional to 20,675.75, 31,029.30 and 15,143.45 is: 22,726.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,675.75 : 31,029.30 = 15,143.45 : x
  2. Step 2: Convert to fraction form
    20,675.75/31,029.30 = 15,143.45/x
  3. Step 3: Cross multiply
    20,675.75x = 31,029.30 × 15,143.45
  4. Step 4: Simplify right side
    20,675.75x = 469,890,497.94
  5. Step 5: Solve for x
    x = 469,890,497.94/20,675.75
  6. Step 6: Final answer
    x = 22,726.65

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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.