Home / 20,830.20-28,759.10-18,588.22

Finding the Fourth Proportional to 20,830.20, 28,759.10 and 18,588.22

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Solution

The fourth proportional to 20,830.20, 28,759.10 and 18,588.22 is: 25,663.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,830.20 : 28,759.10 = 18,588.22 : x
  2. Step 2: Convert to fraction form
    20,830.20/28,759.10 = 18,588.22/x
  3. Step 3: Cross multiply
    20,830.20x = 28,759.10 × 18,588.22
  4. Step 4: Simplify right side
    20,830.20x = 534,580,474.73
  5. Step 5: Solve for x
    x = 534,580,474.73/20,830.20
  6. Step 6: Final answer
    x = 25,663.72

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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.