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Finding the Fourth Proportional to 6,459.75, 8,915.54 and 3,807.81

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Solution

The fourth proportional to 6,459.75, 8,915.54 and 3,807.81 is: 5,255.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,459.75 : 8,915.54 = 3,807.81 : x
  2. Step 2: Convert to fraction form
    6,459.75/8,915.54 = 3,807.81/x
  3. Step 3: Cross multiply
    6,459.75x = 8,915.54 × 3,807.81
  4. Step 4: Simplify right side
    6,459.75x = 33,948,663.33
  5. Step 5: Solve for x
    x = 33,948,663.33/6,459.75
  6. Step 6: Final answer
    x = 5,255.41

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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.