Home / 18,285.10-27,428.70-5,138.50

Finding the Fourth Proportional to 18,285.10, 27,428.70 and 5,138.50

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Solution

The fourth proportional to 18,285.10, 27,428.70 and 5,138.50 is: 7,708.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,285.10 : 27,428.70 = 5,138.50 : x
  2. Step 2: Convert to fraction form
    18,285.10/27,428.70 = 5,138.50/x
  3. Step 3: Cross multiply
    18,285.10x = 27,428.70 × 5,138.50
  4. Step 4: Simplify right side
    18,285.10x = 140,942,374.95
  5. Step 5: Solve for x
    x = 140,942,374.95/18,285.10
  6. Step 6: Final answer
    x = 7,708.05

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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.