Home / 19,419.89-29,129.82-8,319.38

Finding the Fourth Proportional to 19,419.89, 29,129.82 and 8,319.38

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Solution

The fourth proportional to 19,419.89, 29,129.82 and 8,319.38 is: 12,479.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,419.89 : 29,129.82 = 8,319.38 : x
  2. Step 2: Convert to fraction form
    19,419.89/29,129.82 = 8,319.38/x
  3. Step 3: Cross multiply
    19,419.89x = 29,129.82 × 8,319.38
  4. Step 4: Simplify right side
    19,419.89x = 242,341,896.26
  5. Step 5: Solve for x
    x = 242,341,896.26/19,419.89
  6. Step 6: Final answer
    x = 12,479.06

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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.