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Finding the Fourth Proportional to 6,859.81, 10,278.78 and 4,392.60

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Solution

The fourth proportional to 6,859.81, 10,278.78 and 4,392.60 is: 6,581.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,859.81 : 10,278.78 = 4,392.60 : x
  2. Step 2: Convert to fraction form
    6,859.81/10,278.78 = 4,392.60/x
  3. Step 3: Cross multiply
    6,859.81x = 10,278.78 × 4,392.60
  4. Step 4: Simplify right side
    6,859.81x = 45,150,569.03
  5. Step 5: Solve for x
    x = 45,150,569.03/6,859.81
  6. Step 6: Final answer
    x = 6,581.90

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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.