Home / 20,282.40-27,999.72-15,734.88

Finding the Fourth Proportional to 20,282.40, 27,999.72 and 15,734.88

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Solution

The fourth proportional to 20,282.40, 27,999.72 and 15,734.88 is: 21,721.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,282.40 : 27,999.72 = 15,734.88 : x
  2. Step 2: Convert to fraction form
    20,282.40/27,999.72 = 15,734.88/x
  3. Step 3: Cross multiply
    20,282.40x = 27,999.72 × 15,734.88
  4. Step 4: Simplify right side
    20,282.40x = 440,572,234.23
  5. Step 5: Solve for x
    x = 440,572,234.23/20,282.40
  6. Step 6: Final answer
    x = 21,721.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.