Home / 21,178.68-29,222.82-13,219.62

Finding the Fourth Proportional to 21,178.68, 29,222.82 and 13,219.62

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Solution

The fourth proportional to 21,178.68, 29,222.82 and 13,219.62 is: 18,240.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,178.68 : 29,222.82 = 13,219.62 : x
  2. Step 2: Convert to fraction form
    21,178.68/29,222.82 = 13,219.62/x
  3. Step 3: Cross multiply
    21,178.68x = 29,222.82 × 13,219.62
  4. Step 4: Simplify right side
    21,178.68x = 386,314,575.73
  5. Step 5: Solve for x
    x = 386,314,575.73/21,178.68
  6. Step 6: Final answer
    x = 18,240.73

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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.