Home / 20,706.20-28,567.27-13,540.31

Finding the Fourth Proportional to 20,706.20, 28,567.27 and 13,540.31

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Solution

The fourth proportional to 20,706.20, 28,567.27 and 13,540.31 is: 18,680.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,706.20 : 28,567.27 = 13,540.31 : x
  2. Step 2: Convert to fraction form
    20,706.20/28,567.27 = 13,540.31/x
  3. Step 3: Cross multiply
    20,706.20x = 28,567.27 × 13,540.31
  4. Step 4: Simplify right side
    20,706.20x = 386,809,691.65
  5. Step 5: Solve for x
    x = 386,809,691.65/20,706.20
  6. Step 6: Final answer
    x = 18,680.86

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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.