Home / 10,778.12-14,868.88-7,789.22

Finding the Fourth Proportional to 10,778.12, 14,868.88 and 7,789.22

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Solution

The fourth proportional to 10,778.12, 14,868.88 and 7,789.22 is: 10,745.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,778.12 : 14,868.88 = 7,789.22 : x
  2. Step 2: Convert to fraction form
    10,778.12/14,868.88 = 7,789.22/x
  3. Step 3: Cross multiply
    10,778.12x = 14,868.88 × 7,789.22
  4. Step 4: Simplify right side
    10,778.12x = 115,816,977.47
  5. Step 5: Solve for x
    x = 115,816,977.47/10,778.12
  6. Step 6: Final answer
    x = 10,745.56

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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.