Home / 20,860.66-31,301.25-8,380.18

Finding the Fourth Proportional to 20,860.66, 31,301.25 and 8,380.18

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Solution

The fourth proportional to 20,860.66, 31,301.25 and 8,380.18 is: 12,574.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,860.66 : 31,301.25 = 8,380.18 : x
  2. Step 2: Convert to fraction form
    20,860.66/31,301.25 = 8,380.18/x
  3. Step 3: Cross multiply
    20,860.66x = 31,301.25 × 8,380.18
  4. Step 4: Simplify right side
    20,860.66x = 262,310,109.23
  5. Step 5: Solve for x
    x = 262,310,109.23/20,860.66
  6. Step 6: Final answer
    x = 12,574.39

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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.