Home / 20,512.70-28,305.80-12,013.68

Finding the Fourth Proportional to 20,512.70, 28,305.80 and 12,013.68

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Solution

The fourth proportional to 20,512.70, 28,305.80 and 12,013.68 is: 16,577.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,512.70 : 28,305.80 = 12,013.68 : x
  2. Step 2: Convert to fraction form
    20,512.70/28,305.80 = 12,013.68/x
  3. Step 3: Cross multiply
    20,512.70x = 28,305.80 × 12,013.68
  4. Step 4: Simplify right side
    20,512.70x = 340,056,823.34
  5. Step 5: Solve for x
    x = 340,056,823.34/20,512.70
  6. Step 6: Final answer
    x = 16,577.87

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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.