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Finding the Fourth Proportional to 6,439.50, 8,885.16 and 3,787.20

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Solution

The fourth proportional to 6,439.50, 8,885.16 and 3,787.20 is: 5,225.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,439.50 : 8,885.16 = 3,787.20 : x
  2. Step 2: Convert to fraction form
    6,439.50/8,885.16 = 3,787.20/x
  3. Step 3: Cross multiply
    6,439.50x = 8,885.16 × 3,787.20
  4. Step 4: Simplify right side
    6,439.50x = 33,649,877.95
  5. Step 5: Solve for x
    x = 33,649,877.95/6,439.50
  6. Step 6: Final answer
    x = 5,225.54

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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.