Home / 20,242.32-27,878.76-18,687.12

Finding the Fourth Proportional to 20,242.32, 27,878.76 and 18,687.12

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Solution

The fourth proportional to 20,242.32, 27,878.76 and 18,687.12 is: 25,736.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,242.32 : 27,878.76 = 18,687.12 : x
  2. Step 2: Convert to fraction form
    20,242.32/27,878.76 = 18,687.12/x
  3. Step 3: Cross multiply
    20,242.32x = 27,878.76 × 18,687.12
  4. Step 4: Simplify right side
    20,242.32x = 520,973,733.57
  5. Step 5: Solve for x
    x = 520,973,733.57/20,242.32
  6. Step 6: Final answer
    x = 25,736.86

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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.