Home / 20,387.38-30,590.43-12,083.86

Finding the Fourth Proportional to 20,387.38, 30,590.43 and 12,083.86

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Solution

The fourth proportional to 20,387.38, 30,590.43 and 12,083.86 is: 18,131.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,387.38 : 30,590.43 = 12,083.86 : x
  2. Step 2: Convert to fraction form
    20,387.38/30,590.43 = 12,083.86/x
  3. Step 3: Cross multiply
    20,387.38x = 30,590.43 × 12,083.86
  4. Step 4: Simplify right side
    20,387.38x = 369,650,473.46
  5. Step 5: Solve for x
    x = 369,650,473.46/20,387.38
  6. Step 6: Final answer
    x = 18,131.34

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1.5x scale

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.