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Finding the Fourth Proportional to 6,859.81, 10,288.65 and 2,179.21

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Solution

The fourth proportional to 6,859.81, 10,288.65 and 2,179.21 is: 3,268.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,859.81 : 10,288.65 = 2,179.21 : x
  2. Step 2: Convert to fraction form
    6,859.81/10,288.65 = 2,179.21/x
  3. Step 3: Cross multiply
    6,859.81x = 10,288.65 × 2,179.21
  4. Step 4: Simplify right side
    6,859.81x = 22,421,100.92
  5. Step 5: Solve for x
    x = 22,421,100.92/6,859.81
  6. Step 6: Final answer
    x = 3,268.47

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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.