Home / 21,279.91-29,361.80-12,326.87

Finding the Fourth Proportional to 21,279.91, 29,361.80 and 12,326.87

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Solution

The fourth proportional to 21,279.91, 29,361.80 and 12,326.87 is: 17,008.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,279.91 : 29,361.80 = 12,326.87 : x
  2. Step 2: Convert to fraction form
    21,279.91/29,361.80 = 12,326.87/x
  3. Step 3: Cross multiply
    21,279.91x = 29,361.80 × 12,326.87
  4. Step 4: Simplify right side
    21,279.91x = 361,939,091.57
  5. Step 5: Solve for x
    x = 361,939,091.57/21,279.91
  6. Step 6: Final answer
    x = 17,008.49

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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.