Home / 20,775.12-28,675.80-14,489.52

Finding the Fourth Proportional to 20,775.12, 28,675.80 and 14,489.52

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Solution

The fourth proportional to 20,775.12, 28,675.80 and 14,489.52 is: 19,999.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,775.12 : 28,675.80 = 14,489.52 : x
  2. Step 2: Convert to fraction form
    20,775.12/28,675.80 = 14,489.52/x
  3. Step 3: Cross multiply
    20,775.12x = 28,675.80 × 14,489.52
  4. Step 4: Simplify right side
    20,775.12x = 415,498,577.62
  5. Step 5: Solve for x
    x = 415,498,577.62/20,775.12
  6. Step 6: Final answer
    x = 19,999.82

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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.