Home / 20,418.98-28,177.13-13,703.68

Finding the Fourth Proportional to 20,418.98, 28,177.13 and 13,703.68

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Solution

The fourth proportional to 20,418.98, 28,177.13 and 13,703.68 is: 18,910.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,418.98 : 28,177.13 = 13,703.68 : x
  2. Step 2: Convert to fraction form
    20,418.98/28,177.13 = 13,703.68/x
  3. Step 3: Cross multiply
    20,418.98x = 28,177.13 × 13,703.68
  4. Step 4: Simplify right side
    20,418.98x = 386,130,231.95
  5. Step 5: Solve for x
    x = 386,130,231.95/20,418.98
  6. Step 6: Final answer
    x = 18,910.36

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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.