Home / 20,272.59-27,975.89-11,320.25

Finding the Fourth Proportional to 20,272.59, 27,975.89 and 11,320.25

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Solution

The fourth proportional to 20,272.59, 27,975.89 and 11,320.25 is: 15,621.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,272.59 : 27,975.89 = 11,320.25 : x
  2. Step 2: Convert to fraction form
    20,272.59/27,975.89 = 11,320.25/x
  3. Step 3: Cross multiply
    20,272.59x = 27,975.89 × 11,320.25
  4. Step 4: Simplify right side
    20,272.59x = 316,693,872.29
  5. Step 5: Solve for x
    x = 316,693,872.29/20,272.59
  6. Step 6: Final answer
    x = 15,621.78

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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.