Home / 27,980.16-41,979.96-12,408.72

Finding the Fourth Proportional to 27,980.16, 41,979.96 and 12,408.72

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Solution

The fourth proportional to 27,980.16, 41,979.96 and 12,408.72 is: 18,617.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,980.16 : 41,979.96 = 12,408.72 : x
  2. Step 2: Convert to fraction form
    27,980.16/41,979.96 = 12,408.72/x
  3. Step 3: Cross multiply
    27,980.16x = 41,979.96 × 12,408.72
  4. Step 4: Simplify right side
    27,980.16x = 520,917,569.25
  5. Step 5: Solve for x
    x = 520,917,569.25/27,980.16
  6. Step 6: Final answer
    x = 18,617.39

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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.