Home / 20,512.12-28,305.30-12,127

Finding the Fourth Proportional to 20,512.12, 28,305.30 and 12,127

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Solution

The fourth proportional to 20,512.12, 28,305.30 and 12,127 is: 16,734.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,512.12 : 28,305.30 = 12,127 : x
  2. Step 2: Convert to fraction form
    20,512.12/28,305.30 = 12,127/x
  3. Step 3: Cross multiply
    20,512.12x = 28,305.30 × 12,127
  4. Step 4: Simplify right side
    20,512.12x = 343,258,373.10
  5. Step 5: Solve for x
    x = 343,258,373.10/20,512.12
  6. Step 6: Final answer
    x = 16,734.42

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1.5x scale

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.