Home / 20,271.86-27,974.90-11,319.51

Finding the Fourth Proportional to 20,271.86, 27,974.90 and 11,319.51

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Solution

The fourth proportional to 20,271.86, 27,974.90 and 11,319.51 is: 15,620.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,271.86 : 27,974.90 = 11,319.51 : x
  2. Step 2: Convert to fraction form
    20,271.86/27,974.90 = 11,319.51/x
  3. Step 3: Cross multiply
    20,271.86x = 27,974.90 × 11,319.51
  4. Step 4: Simplify right side
    20,271.86x = 316,662,103.70
  5. Step 5: Solve for x
    x = 316,662,103.70/20,271.86
  6. Step 6: Final answer
    x = 15,620.78

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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.