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Finding the Fourth Proportional to 6,368.92, 8,787 and 3,851.80

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Solution

The fourth proportional to 6,368.92, 8,787 and 3,851.80 is: 5,314.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,368.92 : 8,787 = 3,851.80 : x
  2. Step 2: Convert to fraction form
    6,368.92/8,787 = 3,851.80/x
  3. Step 3: Cross multiply
    6,368.92x = 8,787 × 3,851.80
  4. Step 4: Simplify right side
    6,368.92x = 33,845,766.60
  5. Step 5: Solve for x
    x = 33,845,766.60/6,368.92
  6. Step 6: Final answer
    x = 5,314.21

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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.