Home / 20,539.80-30,769.72-13,498.57

Finding the Fourth Proportional to 20,539.80, 30,769.72 and 13,498.57

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Solution

The fourth proportional to 20,539.80, 30,769.72 and 13,498.57 is: 20,221.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,539.80 : 30,769.72 = 13,498.57 : x
  2. Step 2: Convert to fraction form
    20,539.80/30,769.72 = 13,498.57/x
  3. Step 3: Cross multiply
    20,539.80x = 30,769.72 × 13,498.57
  4. Step 4: Simplify right side
    20,539.80x = 415,347,386.49
  5. Step 5: Solve for x
    x = 415,347,386.49/20,539.80
  6. Step 6: Final answer
    x = 20,221.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.