Home / 42,879.68-64,325.75-13,299.90

Finding the Fourth Proportional to 42,879.68, 64,325.75 and 13,299.90

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Solution

The fourth proportional to 42,879.68, 64,325.75 and 13,299.90 is: 19,951.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,879.68 : 64,325.75 = 13,299.90 : x
  2. Step 2: Convert to fraction form
    42,879.68/64,325.75 = 13,299.90/x
  3. Step 3: Cross multiply
    42,879.68x = 64,325.75 × 13,299.90
  4. Step 4: Simplify right side
    42,879.68x = 855,525,734.70
  5. Step 5: Solve for x
    x = 855,525,734.70/42,879.68
  6. Step 6: Final answer
    x = 19,951.78

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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.