Home / 21,144.30-29,178.36-12,192.18

Finding the Fourth Proportional to 21,144.30, 29,178.36 and 12,192.18

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Solution

The fourth proportional to 21,144.30, 29,178.36 and 12,192.18 is: 16,824.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,144.30 : 29,178.36 = 12,192.18 : x
  2. Step 2: Convert to fraction form
    21,144.30/29,178.36 = 12,192.18/x
  3. Step 3: Cross multiply
    21,144.30x = 29,178.36 × 12,192.18
  4. Step 4: Simplify right side
    21,144.30x = 355,747,817.22
  5. Step 5: Solve for x
    x = 355,747,817.22/21,144.30
  6. Step 6: Final answer
    x = 16,824.76

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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.