Home / 20,961.60-31,449.36-17,865.12

Finding the Fourth Proportional to 20,961.60, 31,449.36 and 17,865.12

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Solution

The fourth proportional to 20,961.60, 31,449.36 and 17,865.12 is: 26,803.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,961.60 : 31,449.36 = 17,865.12 : x
  2. Step 2: Convert to fraction form
    20,961.60/31,449.36 = 17,865.12/x
  3. Step 3: Cross multiply
    20,961.60x = 31,449.36 × 17,865.12
  4. Step 4: Simplify right side
    20,961.60x = 561,846,590.32
  5. Step 5: Solve for x
    x = 561,846,590.32/20,961.60
  6. Step 6: Final answer
    x = 26,803.61

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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.