Home / 20,899.60-31,327.80-11,525.20

Finding the Fourth Proportional to 20,899.60, 31,327.80 and 11,525.20

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Solution

The fourth proportional to 20,899.60, 31,327.80 and 11,525.20 is: 17,275.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,899.60 : 31,327.80 = 11,525.20 : x
  2. Step 2: Convert to fraction form
    20,899.60/31,327.80 = 11,525.20/x
  3. Step 3: Cross multiply
    20,899.60x = 31,327.80 × 11,525.20
  4. Step 4: Simplify right side
    20,899.60x = 361,059,160.56
  5. Step 5: Solve for x
    x = 361,059,160.56/20,899.60
  6. Step 6: Final answer
    x = 17,275.89

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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.