Home / 20,881.96-28,817.22-11,321.92

Finding the Fourth Proportional to 20,881.96, 28,817.22 and 11,321.92

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Solution

The fourth proportional to 20,881.96, 28,817.22 and 11,321.92 is: 15,624.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,881.96 : 28,817.22 = 11,321.92 : x
  2. Step 2: Convert to fraction form
    20,881.96/28,817.22 = 11,321.92/x
  3. Step 3: Cross multiply
    20,881.96x = 28,817.22 × 11,321.92
  4. Step 4: Simplify right side
    20,881.96x = 326,266,259.46
  5. Step 5: Solve for x
    x = 326,266,259.46/20,881.96
  6. Step 6: Final answer
    x = 15,624.31

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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.