Home / 18,287.10-27,431.67-5,138.45

Finding the Fourth Proportional to 18,287.10, 27,431.67 and 5,138.45

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Solution

The fourth proportional to 18,287.10, 27,431.67 and 5,138.45 is: 7,707.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,287.10 : 27,431.67 = 5,138.45 : x
  2. Step 2: Convert to fraction form
    18,287.10/27,431.67 = 5,138.45/x
  3. Step 3: Cross multiply
    18,287.10x = 27,431.67 × 5,138.45
  4. Step 4: Simplify right side
    18,287.10x = 140,956,127.55
  5. Step 5: Solve for x
    x = 140,956,127.55/18,287.10
  6. Step 6: Final answer
    x = 7,707.95

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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.