Home / 20,291.11-28,001.46-11,338.99

Finding the Fourth Proportional to 20,291.11, 28,001.46 and 11,338.99

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Solution

The fourth proportional to 20,291.11, 28,001.46 and 11,338.99 is: 15,647.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,291.11 : 28,001.46 = 11,338.99 : x
  2. Step 2: Convert to fraction form
    20,291.11/28,001.46 = 11,338.99/x
  3. Step 3: Cross multiply
    20,291.11x = 28,001.46 × 11,338.99
  4. Step 4: Simplify right side
    20,291.11x = 317,508,274.93
  5. Step 5: Solve for x
    x = 317,508,274.93/20,291.11
  6. Step 6: Final answer
    x = 15,647.65

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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.