Home / 12,839.24-17,718-7,174.55

Finding the Fourth Proportional to 12,839.24, 17,718 and 7,174.55

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Solution

The fourth proportional to 12,839.24, 17,718 and 7,174.55 is: 9,900.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,839.24 : 17,718 = 7,174.55 : x
  2. Step 2: Convert to fraction form
    12,839.24/17,718 = 7,174.55/x
  3. Step 3: Cross multiply
    12,839.24x = 17,718 × 7,174.55
  4. Step 4: Simplify right side
    12,839.24x = 127,118,588.31
  5. Step 5: Solve for x
    x = 127,118,588.31/12,839.24
  6. Step 6: Final answer
    x = 9,900.79

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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.