Home / 21,729.42-29,987.19-12,298.50

Finding the Fourth Proportional to 21,729.42, 29,987.19 and 12,298.50

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Solution

The fourth proportional to 21,729.42, 29,987.19 and 12,298.50 is: 16,972.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,729.42 : 29,987.19 = 12,298.50 : x
  2. Step 2: Convert to fraction form
    21,729.42/29,987.19 = 12,298.50/x
  3. Step 3: Cross multiply
    21,729.42x = 29,987.19 × 12,298.50
  4. Step 4: Simplify right side
    21,729.42x = 368,797,456.22
  5. Step 5: Solve for x
    x = 368,797,456.22/21,729.42
  6. Step 6: Final answer
    x = 16,972.26

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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.