Home / 20,834.25-28,760.75-13,290.94

Finding the Fourth Proportional to 20,834.25, 28,760.75 and 13,290.94

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Solution

The fourth proportional to 20,834.25, 28,760.75 and 13,290.94 is: 18,347.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,834.25 : 28,760.75 = 13,290.94 : x
  2. Step 2: Convert to fraction form
    20,834.25/28,760.75 = 13,290.94/x
  3. Step 3: Cross multiply
    20,834.25x = 28,760.75 × 13,290.94
  4. Step 4: Simplify right side
    20,834.25x = 382,257,402.61
  5. Step 5: Solve for x
    x = 382,257,402.61/20,834.25
  6. Step 6: Final answer
    x = 18,347.55

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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.