Home / 7,715.20-10,646.94-4,178.38

Finding the Fourth Proportional to 7,715.20, 10,646.94 and 4,178.38

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Solution

The fourth proportional to 7,715.20, 10,646.94 and 4,178.38 is: 5,766.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,715.20 : 10,646.94 = 4,178.38 : x
  2. Step 2: Convert to fraction form
    7,715.20/10,646.94 = 4,178.38/x
  3. Step 3: Cross multiply
    7,715.20x = 10,646.94 × 4,178.38
  4. Step 4: Simplify right side
    7,715.20x = 44,486,961.16
  5. Step 5: Solve for x
    x = 44,486,961.16/7,715.20
  6. Step 6: Final answer
    x = 5,766.14

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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.