Home / 21,729.88-29,981.19-12,298.24

Finding the Fourth Proportional to 21,729.88, 29,981.19 and 12,298.24

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Solution

The fourth proportional to 21,729.88, 29,981.19 and 12,298.24 is: 16,968.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,729.88 : 29,981.19 = 12,298.24 : x
  2. Step 2: Convert to fraction form
    21,729.88/29,981.19 = 12,298.24/x
  3. Step 3: Cross multiply
    21,729.88x = 29,981.19 × 12,298.24
  4. Step 4: Simplify right side
    21,729.88x = 368,715,870.11
  5. Step 5: Solve for x
    x = 368,715,870.11/21,729.88
  6. Step 6: Final answer
    x = 16,968.15

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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.