Home / 7,190.78-10,778.84-5,455.76

Finding the Fourth Proportional to 7,190.78, 10,778.84 and 5,455.76

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Solution

The fourth proportional to 7,190.78, 10,778.84 and 5,455.76 is: 8,178.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,190.78 : 10,778.84 = 5,455.76 : x
  2. Step 2: Convert to fraction form
    7,190.78/10,778.84 = 5,455.76/x
  3. Step 3: Cross multiply
    7,190.78x = 10,778.84 × 5,455.76
  4. Step 4: Simplify right side
    7,190.78x = 58,806,764.12
  5. Step 5: Solve for x
    x = 58,806,764.12/7,190.78
  6. Step 6: Final answer
    x = 8,178.08

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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.