Home / 28,219.20-38,923.92-18,131.76

Finding the Fourth Proportional to 28,219.20, 38,923.92 and 18,131.76

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Solution

The fourth proportional to 28,219.20, 38,923.92 and 18,131.76 is: 25,009.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,219.20 : 38,923.92 = 18,131.76 : x
  2. Step 2: Convert to fraction form
    28,219.20/38,923.92 = 18,131.76/x
  3. Step 3: Cross multiply
    28,219.20x = 38,923.92 × 18,131.76
  4. Step 4: Simplify right side
    28,219.20x = 705,759,175.70
  5. Step 5: Solve for x
    x = 705,759,175.70/28,219.20
  6. Step 6: Final answer
    x = 25,009.89

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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.