Home / 18,961.74-28,439.37-5,107.50

Finding the Fourth Proportional to 18,961.74, 28,439.37 and 5,107.50

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Solution

The fourth proportional to 18,961.74, 28,439.37 and 5,107.50 is: 7,660.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,961.74 : 28,439.37 = 5,107.50 : x
  2. Step 2: Convert to fraction form
    18,961.74/28,439.37 = 5,107.50/x
  3. Step 3: Cross multiply
    18,961.74x = 28,439.37 × 5,107.50
  4. Step 4: Simplify right side
    18,961.74x = 145,254,082.28
  5. Step 5: Solve for x
    x = 145,254,082.28/18,961.74
  6. Step 6: Final answer
    x = 7,660.38

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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.