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Finding the Fourth Proportional to 6,239.74, 8,612.56 and 3,880.48

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Solution

The fourth proportional to 6,239.74, 8,612.56 and 3,880.48 is: 5,356.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,239.74 : 8,612.56 = 3,880.48 : x
  2. Step 2: Convert to fraction form
    6,239.74/8,612.56 = 3,880.48/x
  3. Step 3: Cross multiply
    6,239.74x = 8,612.56 × 3,880.48
  4. Step 4: Simplify right side
    6,239.74x = 33,420,866.83
  5. Step 5: Solve for x
    x = 33,420,866.83/6,239.74
  6. Step 6: Final answer
    x = 5,356.13

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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.