Home / 19,876.91-27,428.84-11,379.10

Finding the Fourth Proportional to 19,876.91, 27,428.84 and 11,379.10

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Solution

The fourth proportional to 19,876.91, 27,428.84 and 11,379.10 is: 15,702.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,876.91 : 27,428.84 = 11,379.10 : x
  2. Step 2: Convert to fraction form
    19,876.91/27,428.84 = 11,379.10/x
  3. Step 3: Cross multiply
    19,876.91x = 27,428.84 × 11,379.10
  4. Step 4: Simplify right side
    19,876.91x = 312,115,387.78
  5. Step 5: Solve for x
    x = 312,115,387.78/19,876.91
  6. Step 6: Final answer
    x = 15,702.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.