Home / 3,916.70-5,388.80-3,420.52

Finding the Fourth Proportional to 3,916.70, 5,388.80 and 3,420.52

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Solution

The fourth proportional to 3,916.70, 5,388.80 and 3,420.52 is: 4,706.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,916.70 : 5,388.80 = 3,420.52 : x
  2. Step 2: Convert to fraction form
    3,916.70/5,388.80 = 3,420.52/x
  3. Step 3: Cross multiply
    3,916.70x = 5,388.80 × 3,420.52
  4. Step 4: Simplify right side
    3,916.70x = 18,432,467.60
  5. Step 5: Solve for x
    x = 18,432,467.60/3,916.70
  6. Step 6: Final answer
    x = 4,706.13

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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.