Home / 20,272.11-27,975.21-11,319.53

Finding the Fourth Proportional to 20,272.11, 27,975.21 and 11,319.53

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Solution

The fourth proportional to 20,272.11, 27,975.21 and 11,319.53 is: 15,620.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,272.11 : 27,975.21 = 11,319.53 : x
  2. Step 2: Convert to fraction form
    20,272.11/27,975.21 = 11,319.53/x
  3. Step 3: Cross multiply
    20,272.11x = 27,975.21 × 11,319.53
  4. Step 4: Simplify right side
    20,272.11x = 316,666,088.98
  5. Step 5: Solve for x
    x = 316,666,088.98/20,272.11
  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.