Home / 21,729.52-29,987.19-12,298.08

Finding the Fourth Proportional to 21,729.52, 29,987.19 and 12,298.08

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Solution

The fourth proportional to 21,729.52, 29,987.19 and 12,298.08 is: 16,971.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,729.52 : 29,987.19 = 12,298.08 : x
  2. Step 2: Convert to fraction form
    21,729.52/29,987.19 = 12,298.08/x
  3. Step 3: Cross multiply
    21,729.52x = 29,987.19 × 12,298.08
  4. Step 4: Simplify right side
    21,729.52x = 368,784,770.78
  5. Step 5: Solve for x
    x = 368,784,770.78/21,729.52
  6. Step 6: Final answer
    x = 16,971.61

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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.