Home / 12,855.75-17,740.22-7,190.72

Finding the Fourth Proportional to 12,855.75, 17,740.22 and 7,190.72

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Solution

The fourth proportional to 12,855.75, 17,740.22 and 7,190.72 is: 9,922.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,855.75 : 17,740.22 = 7,190.72 : x
  2. Step 2: Convert to fraction form
    12,855.75/17,740.22 = 7,190.72/x
  3. Step 3: Cross multiply
    12,855.75x = 17,740.22 × 7,190.72
  4. Step 4: Simplify right side
    12,855.75x = 127,564,954.76
  5. Step 5: Solve for x
    x = 127,564,954.76/12,855.75
  6. Step 6: Final answer
    x = 9,922.80

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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.