Home / 20,948.86-31,404.15-19,122.72

Finding the Fourth Proportional to 20,948.86, 31,404.15 and 19,122.72

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Solution

The fourth proportional to 20,948.86, 31,404.15 and 19,122.72 is: 28,666.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,948.86 : 31,404.15 = 19,122.72 : x
  2. Step 2: Convert to fraction form
    20,948.86/31,404.15 = 19,122.72/x
  3. Step 3: Cross multiply
    20,948.86x = 31,404.15 × 19,122.72
  4. Step 4: Simplify right side
    20,948.86x = 600,532,767.29
  5. Step 5: Solve for x
    x = 600,532,767.29/20,948.86
  6. Step 6: Final answer
    x = 28,666.61

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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.