Home / 19,398.39-29,040.18-11,979

Finding the Fourth Proportional to 19,398.39, 29,040.18 and 11,979

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Solution

The fourth proportional to 19,398.39, 29,040.18 and 11,979 is: 17,933.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,398.39 : 29,040.18 = 11,979 : x
  2. Step 2: Convert to fraction form
    19,398.39/29,040.18 = 11,979/x
  3. Step 3: Cross multiply
    19,398.39x = 29,040.18 × 11,979
  4. Step 4: Simplify right side
    19,398.39x = 347,872,316.22
  5. Step 5: Solve for x
    x = 347,872,316.22/19,398.39
  6. Step 6: Final answer
    x = 17,933.05

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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.