Home / 20,791.74-28,682.61-15,117.69

Finding the Fourth Proportional to 20,791.74, 28,682.61 and 15,117.69

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Solution

The fourth proportional to 20,791.74, 28,682.61 and 15,117.69 is: 20,855.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,791.74 : 28,682.61 = 15,117.69 : x
  2. Step 2: Convert to fraction form
    20,791.74/28,682.61 = 15,117.69/x
  3. Step 3: Cross multiply
    20,791.74x = 28,682.61 × 15,117.69
  4. Step 4: Simplify right side
    20,791.74x = 433,614,806.37
  5. Step 5: Solve for x
    x = 433,614,806.37/20,791.74
  6. Step 6: Final answer
    x = 20,855.15

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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.