Home / 20,335.60-28,060.84-11,381.88

Finding the Fourth Proportional to 20,335.60, 28,060.84 and 11,381.88

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Solution

The fourth proportional to 20,335.60, 28,060.84 and 11,381.88 is: 15,705.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,335.60 : 28,060.84 = 11,381.88 : x
  2. Step 2: Convert to fraction form
    20,335.60/28,060.84 = 11,381.88/x
  3. Step 3: Cross multiply
    20,335.60x = 28,060.84 × 11,381.88
  4. Step 4: Simplify right side
    20,335.60x = 319,385,113.58
  5. Step 5: Solve for x
    x = 319,385,113.58/20,335.60
  6. Step 6: Final answer
    x = 15,705.71

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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.