Home / 19,979.31-29,969.03-5,188.35

Finding the Fourth Proportional to 19,979.31, 29,969.03 and 5,188.35

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Solution

The fourth proportional to 19,979.31, 29,969.03 and 5,188.35 is: 7,782.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,979.31 : 29,969.03 = 5,188.35 : x
  2. Step 2: Convert to fraction form
    19,979.31/29,969.03 = 5,188.35/x
  3. Step 3: Cross multiply
    19,979.31x = 29,969.03 × 5,188.35
  4. Step 4: Simplify right side
    19,979.31x = 155,489,790.86
  5. Step 5: Solve for x
    x = 155,489,790.86/19,979.31
  6. Step 6: Final answer
    x = 7,782.54

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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.