Home / 21,279.72-29,367.99-11,849.70

Finding the Fourth Proportional to 21,279.72, 29,367.99 and 11,849.70

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Solution

The fourth proportional to 21,279.72, 29,367.99 and 11,849.70 is: 16,353.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,279.72 : 29,367.99 = 11,849.70 : x
  2. Step 2: Convert to fraction form
    21,279.72/29,367.99 = 11,849.70/x
  3. Step 3: Cross multiply
    21,279.72x = 29,367.99 × 11,849.70
  4. Step 4: Simplify right side
    21,279.72x = 348,001,871.10
  5. Step 5: Solve for x
    x = 348,001,871.10/21,279.72
  6. Step 6: Final answer
    x = 16,353.69

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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.