Home / 21,144.32-29,178.88-11,712.84

Finding the Fourth Proportional to 21,144.32, 29,178.88 and 11,712.84

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Solution

The fourth proportional to 21,144.32, 29,178.88 and 11,712.84 is: 16,163.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,144.32 : 29,178.88 = 11,712.84 : x
  2. Step 2: Convert to fraction form
    21,144.32/29,178.88 = 11,712.84/x
  3. Step 3: Cross multiply
    21,144.32x = 29,178.88 × 11,712.84
  4. Step 4: Simplify right side
    21,144.32x = 341,767,552.82
  5. Step 5: Solve for x
    x = 341,767,552.82/21,144.32
  6. Step 6: Final answer
    x = 16,163.56

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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.