Home / 10,440.70-15,664.30-3,420.78

Finding the Fourth Proportional to 10,440.70, 15,664.30 and 3,420.78

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Solution

The fourth proportional to 10,440.70, 15,664.30 and 3,420.78 is: 5,132.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,440.70 : 15,664.30 = 3,420.78 : x
  2. Step 2: Convert to fraction form
    10,440.70/15,664.30 = 3,420.78/x
  3. Step 3: Cross multiply
    10,440.70x = 15,664.30 × 3,420.78
  4. Step 4: Simplify right side
    10,440.70x = 53,584,061.48
  5. Step 5: Solve for x
    x = 53,584,061.48/10,440.70
  6. Step 6: Final answer
    x = 5,132.23

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.