Home / 20,799.72-28,705.60-11,369.70

Finding the Fourth Proportional to 20,799.72, 28,705.60 and 11,369.70

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Solution

The fourth proportional to 20,799.72, 28,705.60 and 11,369.70 is: 15,691.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,799.72 : 28,705.60 = 11,369.70 : x
  2. Step 2: Convert to fraction form
    20,799.72/28,705.60 = 11,369.70/x
  3. Step 3: Cross multiply
    20,799.72x = 28,705.60 × 11,369.70
  4. Step 4: Simplify right side
    20,799.72x = 326,374,060.32
  5. Step 5: Solve for x
    x = 326,374,060.32/20,799.72
  6. Step 6: Final answer
    x = 15,691.27

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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.