Home / 7,765.20-10,715.49-4,620.78

Finding the Fourth Proportional to 7,765.20, 10,715.49 and 4,620.78

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Solution

The fourth proportional to 7,765.20, 10,715.49 and 4,620.78 is: 6,376.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,765.20 : 10,715.49 = 4,620.78 : x
  2. Step 2: Convert to fraction form
    7,765.20/10,715.49 = 4,620.78/x
  3. Step 3: Cross multiply
    7,765.20x = 10,715.49 × 4,620.78
  4. Step 4: Simplify right side
    7,765.20x = 49,513,921.88
  5. Step 5: Solve for x
    x = 49,513,921.88/7,765.20
  6. Step 6: Final answer
    x = 6,376.39

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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.