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Finding the Fourth Proportional to 6,392.48, 8,821.24 and 4,119.80

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Solution

The fourth proportional to 6,392.48, 8,821.24 and 4,119.80 is: 5,685.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,392.48 : 8,821.24 = 4,119.80 : x
  2. Step 2: Convert to fraction form
    6,392.48/8,821.24 = 4,119.80/x
  3. Step 3: Cross multiply
    6,392.48x = 8,821.24 × 4,119.80
  4. Step 4: Simplify right side
    6,392.48x = 36,341,744.55
  5. Step 5: Solve for x
    x = 36,341,744.55/6,392.48
  6. Step 6: Final answer
    x = 5,685.08

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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.