Home / 20,834.90-28,752.11-11,274.75

Finding the Fourth Proportional to 20,834.90, 28,752.11 and 11,274.75

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Solution

The fourth proportional to 20,834.90, 28,752.11 and 11,274.75 is: 15,559.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,834.90 : 28,752.11 = 11,274.75 : x
  2. Step 2: Convert to fraction form
    20,834.90/28,752.11 = 11,274.75/x
  3. Step 3: Cross multiply
    20,834.90x = 28,752.11 × 11,274.75
  4. Step 4: Simplify right side
    20,834.90x = 324,172,838.13
  5. Step 5: Solve for x
    x = 324,172,838.13/20,834.90
  6. Step 6: Final answer
    x = 15,559.13

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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.