Home / 20,385.38-30,587.43-12,081.86

Finding the Fourth Proportional to 20,385.38, 30,587.43 and 12,081.86

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Solution

The fourth proportional to 20,385.38, 30,587.43 and 12,081.86 is: 18,128.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,385.38 : 30,587.43 = 12,081.86 : x
  2. Step 2: Convert to fraction form
    20,385.38/30,587.43 = 12,081.86/x
  3. Step 3: Cross multiply
    20,385.38x = 30,587.43 × 12,081.86
  4. Step 4: Simplify right side
    20,385.38x = 369,553,047.02
  5. Step 5: Solve for x
    x = 369,553,047.02/20,385.38
  6. Step 6: Final answer
    x = 18,128.34

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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.