Home / 40,979.78-61,472.13-12,900.75

Finding the Fourth Proportional to 40,979.78, 61,472.13 and 12,900.75

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Solution

The fourth proportional to 40,979.78, 61,472.13 and 12,900.75 is: 19,351.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,979.78 : 61,472.13 = 12,900.75 : x
  2. Step 2: Convert to fraction form
    40,979.78/61,472.13 = 12,900.75/x
  3. Step 3: Cross multiply
    40,979.78x = 61,472.13 × 12,900.75
  4. Step 4: Simplify right side
    40,979.78x = 793,036,581.10
  5. Step 5: Solve for x
    x = 793,036,581.10/40,979.78
  6. Step 6: Final answer
    x = 19,351.90

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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.