Home / 20,121.10-30,181.65-18,565.90

Finding the Fourth Proportional to 20,121.10, 30,181.65 and 18,565.90

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Solution

The fourth proportional to 20,121.10, 30,181.65 and 18,565.90 is: 27,848.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,121.10 : 30,181.65 = 18,565.90 : x
  2. Step 2: Convert to fraction form
    20,121.10/30,181.65 = 18,565.90/x
  3. Step 3: Cross multiply
    20,121.10x = 30,181.65 × 18,565.90
  4. Step 4: Simplify right side
    20,121.10x = 560,349,495.74
  5. Step 5: Solve for x
    x = 560,349,495.74/20,121.10
  6. Step 6: Final answer
    x = 27,848.85

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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.