Home / 20,894.08-31,331.04-12,131.20

Finding the Fourth Proportional to 20,894.08, 31,331.04 and 12,131.20

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Solution

The fourth proportional to 20,894.08, 31,331.04 and 12,131.20 is: 18,190.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,894.08 : 31,331.04 = 12,131.20 : x
  2. Step 2: Convert to fraction form
    20,894.08/31,331.04 = 12,131.20/x
  3. Step 3: Cross multiply
    20,894.08x = 31,331.04 × 12,131.20
  4. Step 4: Simplify right side
    20,894.08x = 380,083,112.45
  5. Step 5: Solve for x
    x = 380,083,112.45/20,894.08
  6. Step 6: Final answer
    x = 18,190.95

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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.