Home / 21,729.68-29,986.92-12,298.80

Finding the Fourth Proportional to 21,729.68, 29,986.92 and 12,298.80

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Solution

The fourth proportional to 21,729.68, 29,986.92 and 12,298.80 is: 16,972.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,729.68 : 29,986.92 = 12,298.80 : x
  2. Step 2: Convert to fraction form
    21,729.68/29,986.92 = 12,298.80/x
  3. Step 3: Cross multiply
    21,729.68x = 29,986.92 × 12,298.80
  4. Step 4: Simplify right side
    21,729.68x = 368,803,131.70
  5. Step 5: Solve for x
    x = 368,803,131.70/21,729.68
  6. Step 6: Final answer
    x = 16,972.32

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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.