Home / 21,218.13-29,279.97-12,264.78

Finding the Fourth Proportional to 21,218.13, 29,279.97 and 12,264.78

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Solution

The fourth proportional to 21,218.13, 29,279.97 and 12,264.78 is: 16,924.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,218.13 : 29,279.97 = 12,264.78 : x
  2. Step 2: Convert to fraction form
    21,218.13/29,279.97 = 12,264.78/x
  3. Step 3: Cross multiply
    21,218.13x = 29,279.97 × 12,264.78
  4. Step 4: Simplify right side
    21,218.13x = 359,112,390.46
  5. Step 5: Solve for x
    x = 359,112,390.46/21,218.13
  6. Step 6: Final answer
    x = 16,924.79

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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.