Home / 10,440.20-15,662.74-3,420.20

Finding the Fourth Proportional to 10,440.20, 15,662.74 and 3,420.20

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Solution

The fourth proportional to 10,440.20, 15,662.74 and 3,420.20 is: 5,131.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,440.20 : 15,662.74 = 3,420.20 : x
  2. Step 2: Convert to fraction form
    10,440.20/15,662.74 = 3,420.20/x
  3. Step 3: Cross multiply
    10,440.20x = 15,662.74 × 3,420.20
  4. Step 4: Simplify right side
    10,440.20x = 53,569,703.35
  5. Step 5: Solve for x
    x = 53,569,703.35/10,440.20
  6. Step 6: Final answer
    x = 5,131.10

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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.