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Finding the Fourth Proportional to 6,418.79, 8,859.90 and 4,176.71

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Solution

The fourth proportional to 6,418.79, 8,859.90 and 4,176.71 is: 5,765.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,418.79 : 8,859.90 = 4,176.71 : x
  2. Step 2: Convert to fraction form
    6,418.79/8,859.90 = 4,176.71/x
  3. Step 3: Cross multiply
    6,418.79x = 8,859.90 × 4,176.71
  4. Step 4: Simplify right side
    6,418.79x = 37,005,188.63
  5. Step 5: Solve for x
    x = 37,005,188.63/6,418.79
  6. Step 6: Final answer
    x = 5,765.14

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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.