Home / 20,643.75-28,494.90-13,191.75

Finding the Fourth Proportional to 20,643.75, 28,494.90 and 13,191.75

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Solution

The fourth proportional to 20,643.75, 28,494.90 and 13,191.75 is: 18,208.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,643.75 : 28,494.90 = 13,191.75 : x
  2. Step 2: Convert to fraction form
    20,643.75/28,494.90 = 13,191.75/x
  3. Step 3: Cross multiply
    20,643.75x = 28,494.90 × 13,191.75
  4. Step 4: Simplify right side
    20,643.75x = 375,897,597.08
  5. Step 5: Solve for x
    x = 375,897,597.08/20,643.75
  6. Step 6: Final answer
    x = 18,208.78

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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.