Home / 20,828.13-28,755.98-12,874.87

Finding the Fourth Proportional to 20,828.13, 28,755.98 and 12,874.87

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Solution

The fourth proportional to 20,828.13, 28,755.98 and 12,874.87 is: 17,775.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,828.13 : 28,755.98 = 12,874.87 : x
  2. Step 2: Convert to fraction form
    20,828.13/28,755.98 = 12,874.87/x
  3. Step 3: Cross multiply
    20,828.13x = 28,755.98 × 12,874.87
  4. Step 4: Simplify right side
    20,828.13x = 370,229,504.22
  5. Step 5: Solve for x
    x = 370,229,504.22/20,828.13
  6. Step 6: Final answer
    x = 17,775.46

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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.