Home / 38,979.90-58,475.96-12,678.48

Finding the Fourth Proportional to 38,979.90, 58,475.96 and 12,678.48

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Solution

The fourth proportional to 38,979.90, 58,475.96 and 12,678.48 is: 19,019.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,979.90 : 58,475.96 = 12,678.48 : x
  2. Step 2: Convert to fraction form
    38,979.90/58,475.96 = 12,678.48/x
  3. Step 3: Cross multiply
    38,979.90x = 58,475.96 × 12,678.48
  4. Step 4: Simplify right side
    38,979.90x = 741,386,289.34
  5. Step 5: Solve for x
    x = 741,386,289.34/38,979.90
  6. Step 6: Final answer
    x = 19,019.71

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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.