Home / 10,768.40-16,138.20-7,686.80

Finding the Fourth Proportional to 10,768.40, 16,138.20 and 7,686.80

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Solution

The fourth proportional to 10,768.40, 16,138.20 and 7,686.80 is: 11,519.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,768.40 : 16,138.20 = 7,686.80 : x
  2. Step 2: Convert to fraction form
    10,768.40/16,138.20 = 7,686.80/x
  3. Step 3: Cross multiply
    10,768.40x = 16,138.20 × 7,686.80
  4. Step 4: Simplify right side
    10,768.40x = 124,051,115.76
  5. Step 5: Solve for x
    x = 124,051,115.76/10,768.40
  6. Step 6: Final answer
    x = 11,519.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.