Home / 20,319.86-28,030.11-11,821.02

Finding the Fourth Proportional to 20,319.86, 28,030.11 and 11,821.02

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Solution

The fourth proportional to 20,319.86, 28,030.11 and 11,821.02 is: 16,306.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,319.86 : 28,030.11 = 11,821.02 : x
  2. Step 2: Convert to fraction form
    20,319.86/28,030.11 = 11,821.02/x
  3. Step 3: Cross multiply
    20,319.86x = 28,030.11 × 11,821.02
  4. Step 4: Simplify right side
    20,319.86x = 331,344,490.91
  5. Step 5: Solve for x
    x = 331,344,490.91/20,319.86
  6. Step 6: Final answer
    x = 16,306.44

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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.