Home / 15,439.78-23,157.21-4,908.40

Finding the Fourth Proportional to 15,439.78, 23,157.21 and 4,908.40

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Solution

The fourth proportional to 15,439.78, 23,157.21 and 4,908.40 is: 7,361.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,439.78 : 23,157.21 = 4,908.40 : x
  2. Step 2: Convert to fraction form
    15,439.78/23,157.21 = 4,908.40/x
  3. Step 3: Cross multiply
    15,439.78x = 23,157.21 × 4,908.40
  4. Step 4: Simplify right side
    15,439.78x = 113,664,849.56
  5. Step 5: Solve for x
    x = 113,664,849.56/15,439.78
  6. Step 6: Final answer
    x = 7,361.82

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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.