Home / 3,915.36-5,405.02-2,971.62

Finding the Fourth Proportional to 3,915.36, 5,405.02 and 2,971.62

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Solution

The fourth proportional to 3,915.36, 5,405.02 and 2,971.62 is: 4,102.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,915.36 : 5,405.02 = 2,971.62 : x
  2. Step 2: Convert to fraction form
    3,915.36/5,405.02 = 2,971.62/x
  3. Step 3: Cross multiply
    3,915.36x = 5,405.02 × 2,971.62
  4. Step 4: Simplify right side
    3,915.36x = 16,061,665.53
  5. Step 5: Solve for x
    x = 16,061,665.53/3,915.36
  6. Step 6: Final answer
    x = 4,102.22

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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.