Home / 15,839.88-21,858.69-8,669.79

Finding the Fourth Proportional to 15,839.88, 21,858.69 and 8,669.79

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Solution

The fourth proportional to 15,839.88, 21,858.69 and 8,669.79 is: 11,964.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,839.88 : 21,858.69 = 8,669.79 : x
  2. Step 2: Convert to fraction form
    15,839.88/21,858.69 = 8,669.79/x
  3. Step 3: Cross multiply
    15,839.88x = 21,858.69 × 8,669.79
  4. Step 4: Simplify right side
    15,839.88x = 189,510,251.98
  5. Step 5: Solve for x
    x = 189,510,251.98/15,839.88
  6. Step 6: Final answer
    x = 11,964.13

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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.