Home / 21,179.76-29,229.20-11,748.08

Finding the Fourth Proportional to 21,179.76, 29,229.20 and 11,748.08

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Solution

The fourth proportional to 21,179.76, 29,229.20 and 11,748.08 is: 16,212.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,179.76 : 29,229.20 = 11,748.08 : x
  2. Step 2: Convert to fraction form
    21,179.76/29,229.20 = 11,748.08/x
  3. Step 3: Cross multiply
    21,179.76x = 29,229.20 × 11,748.08
  4. Step 4: Simplify right side
    21,179.76x = 343,386,979.94
  5. Step 5: Solve for x
    x = 343,386,979.94/21,179.76
  6. Step 6: Final answer
    x = 16,212.98

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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.