Home / 20,495.19-28,278.35-13,675.80

Finding the Fourth Proportional to 20,495.19, 28,278.35 and 13,675.80

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Solution

The fourth proportional to 20,495.19, 28,278.35 and 13,675.80 is: 18,869.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,495.19 : 28,278.35 = 13,675.80 : x
  2. Step 2: Convert to fraction form
    20,495.19/28,278.35 = 13,675.80/x
  3. Step 3: Cross multiply
    20,495.19x = 28,278.35 × 13,675.80
  4. Step 4: Simplify right side
    20,495.19x = 386,729,147.88
  5. Step 5: Solve for x
    x = 386,729,147.88/20,495.19
  6. Step 6: Final answer
    x = 18,869.26

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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.