Home / 13,319.12-19,979.66-3,458.45

Finding the Fourth Proportional to 13,319.12, 19,979.66 and 3,458.45

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Solution

The fourth proportional to 13,319.12, 19,979.66 and 3,458.45 is: 5,187.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,319.12 : 19,979.66 = 3,458.45 : x
  2. Step 2: Convert to fraction form
    13,319.12/19,979.66 = 3,458.45/x
  3. Step 3: Cross multiply
    13,319.12x = 19,979.66 × 3,458.45
  4. Step 4: Simplify right side
    13,319.12x = 69,098,563.87
  5. Step 5: Solve for x
    x = 69,098,563.87/13,319.12
  6. Step 6: Final answer
    x = 5,187.92

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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.