Home / 21,144.06-29,178.84-11,712.42

Finding the Fourth Proportional to 21,144.06, 29,178.84 and 11,712.42

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Solution

The fourth proportional to 21,144.06, 29,178.84 and 11,712.42 is: 16,163.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,144.06 : 29,178.84 = 11,712.42 : x
  2. Step 2: Convert to fraction form
    21,144.06/29,178.84 = 11,712.42/x
  3. Step 3: Cross multiply
    21,144.06x = 29,178.84 × 11,712.42
  4. Step 4: Simplify right side
    21,144.06x = 341,754,829.19
  5. Step 5: Solve for x
    x = 341,754,829.19/21,144.06
  6. Step 6: Final answer
    x = 16,163.16

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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.