Home / 39,279.88-54,207.39-21,376.05

Finding the Fourth Proportional to 39,279.88, 54,207.39 and 21,376.05

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Solution

The fourth proportional to 39,279.88, 54,207.39 and 21,376.05 is: 29,499.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,279.88 : 54,207.39 = 21,376.05 : x
  2. Step 2: Convert to fraction form
    39,279.88/54,207.39 = 21,376.05/x
  3. Step 3: Cross multiply
    39,279.88x = 54,207.39 × 21,376.05
  4. Step 4: Simplify right side
    39,279.88x = 1,158,739,879.01
  5. Step 5: Solve for x
    x = 1,158,739,879.01/39,279.88
  6. Step 6: Final answer
    x = 29,499.58

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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.