Home / 7,715.56-10,647.50-4,178.78

Finding the Fourth Proportional to 7,715.56, 10,647.50 and 4,178.78

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Solution

The fourth proportional to 7,715.56, 10,647.50 and 4,178.78 is: 5,766.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,715.56 : 10,647.50 = 4,178.78 : x
  2. Step 2: Convert to fraction form
    7,715.56/10,647.50 = 4,178.78/x
  3. Step 3: Cross multiply
    7,715.56x = 10,647.50 × 4,178.78
  4. Step 4: Simplify right side
    7,715.56x = 44,493,560.05
  5. Step 5: Solve for x
    x = 44,493,560.05/7,715.56
  6. Step 6: Final answer
    x = 5,766.73

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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.