Home / 20,968.12-28,934.52-12,469.78

Finding the Fourth Proportional to 20,968.12, 28,934.52 and 12,469.78

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Solution

The fourth proportional to 20,968.12, 28,934.52 and 12,469.78 is: 17,207.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,968.12 : 28,934.52 = 12,469.78 : x
  2. Step 2: Convert to fraction form
    20,968.12/28,934.52 = 12,469.78/x
  3. Step 3: Cross multiply
    20,968.12x = 28,934.52 × 12,469.78
  4. Step 4: Simplify right side
    20,968.12x = 360,807,098.81
  5. Step 5: Solve for x
    x = 360,807,098.81/20,968.12
  6. Step 6: Final answer
    x = 17,207.41

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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.