Home / 7,715.90-10,647.92-4,179.12

Finding the Fourth Proportional to 7,715.90, 10,647.92 and 4,179.12

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Solution

The fourth proportional to 7,715.90, 10,647.92 and 4,179.12 is: 5,767.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,715.90 : 10,647.92 = 4,179.12 : x
  2. Step 2: Convert to fraction form
    7,715.90/10,647.92 = 4,179.12/x
  3. Step 3: Cross multiply
    7,715.90x = 10,647.92 × 4,179.12
  4. Step 4: Simplify right side
    7,715.90x = 44,498,935.43
  5. Step 5: Solve for x
    x = 44,498,935.43/7,715.90
  6. Step 6: Final answer
    x = 5,767.17

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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.