Home / 10,420.89-15,631.36-2,629.70

Finding the Fourth Proportional to 10,420.89, 15,631.36 and 2,629.70

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Solution

The fourth proportional to 10,420.89, 15,631.36 and 2,629.70 is: 3,944.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,420.89 : 15,631.36 = 2,629.70 : x
  2. Step 2: Convert to fraction form
    10,420.89/15,631.36 = 2,629.70/x
  3. Step 3: Cross multiply
    10,420.89x = 15,631.36 × 2,629.70
  4. Step 4: Simplify right side
    10,420.89x = 41,105,787.39
  5. Step 5: Solve for x
    x = 41,105,787.39/10,420.89
  6. Step 6: Final answer
    x = 3,944.56

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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.