Home / 20,498.57-28,278.36-11,995.43

Finding the Fourth Proportional to 20,498.57, 28,278.36 and 11,995.43

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Solution

The fourth proportional to 20,498.57, 28,278.36 and 11,995.43 is: 16,548.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,498.57 : 28,278.36 = 11,995.43 : x
  2. Step 2: Convert to fraction form
    20,498.57/28,278.36 = 11,995.43/x
  3. Step 3: Cross multiply
    20,498.57x = 28,278.36 × 11,995.43
  4. Step 4: Simplify right side
    20,498.57x = 339,211,087.89
  5. Step 5: Solve for x
    x = 339,211,087.89/20,498.57
  6. Step 6: Final answer
    x = 16,548.04

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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.