Home / 21,799.31-32,640.21-13,858.88

Finding the Fourth Proportional to 21,799.31, 32,640.21 and 13,858.88

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Solution

The fourth proportional to 21,799.31, 32,640.21 and 13,858.88 is: 20,750.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,799.31 : 32,640.21 = 13,858.88 : x
  2. Step 2: Convert to fraction form
    21,799.31/32,640.21 = 13,858.88/x
  3. Step 3: Cross multiply
    21,799.31x = 32,640.21 × 13,858.88
  4. Step 4: Simplify right side
    21,799.31x = 452,356,590.36
  5. Step 5: Solve for x
    x = 452,356,590.36/21,799.31
  6. Step 6: Final answer
    x = 20,750.96

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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.