Home / 12,638.24-17,440.80-7,049.60

Finding the Fourth Proportional to 12,638.24, 17,440.80 and 7,049.60

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Solution

The fourth proportional to 12,638.24, 17,440.80 and 7,049.60 is: 9,728.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,638.24 : 17,440.80 = 7,049.60 : x
  2. Step 2: Convert to fraction form
    12,638.24/17,440.80 = 7,049.60/x
  3. Step 3: Cross multiply
    12,638.24x = 17,440.80 × 7,049.60
  4. Step 4: Simplify right side
    12,638.24x = 122,950,663.68
  5. Step 5: Solve for x
    x = 122,950,663.68/12,638.24
  6. Step 6: Final answer
    x = 9,728.46

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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.