Home / 20,675.80-28,537.14-13,602.88

Finding the Fourth Proportional to 20,675.80, 28,537.14 and 13,602.88

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Solution

The fourth proportional to 20,675.80, 28,537.14 and 13,602.88 is: 18,774.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,675.80 : 28,537.14 = 13,602.88 : x
  2. Step 2: Convert to fraction form
    20,675.80/28,537.14 = 13,602.88/x
  3. Step 3: Cross multiply
    20,675.80x = 28,537.14 × 13,602.88
  4. Step 4: Simplify right side
    20,675.80x = 388,187,290.96
  5. Step 5: Solve for x
    x = 388,187,290.96/20,675.80
  6. Step 6: Final answer
    x = 18,774.96

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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.