Home / 18,983.60-28,478.36-9,121.04

Finding the Fourth Proportional to 18,983.60, 28,478.36 and 9,121.04

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Solution

The fourth proportional to 18,983.60, 28,478.36 and 9,121.04 is: 13,682.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,983.60 : 28,478.36 = 9,121.04 : x
  2. Step 2: Convert to fraction form
    18,983.60/28,478.36 = 9,121.04/x
  3. Step 3: Cross multiply
    18,983.60x = 28,478.36 × 9,121.04
  4. Step 4: Simplify right side
    18,983.60x = 259,752,260.69
  5. Step 5: Solve for x
    x = 259,752,260.69/18,983.60
  6. Step 6: Final answer
    x = 13,682.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.