Home / 13,671.72-20,509.79-5,775.42

Finding the Fourth Proportional to 13,671.72, 20,509.79 and 5,775.42

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Solution

The fourth proportional to 13,671.72, 20,509.79 and 5,775.42 is: 8,664.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,671.72 : 20,509.79 = 5,775.42 : x
  2. Step 2: Convert to fraction form
    13,671.72/20,509.79 = 5,775.42/x
  3. Step 3: Cross multiply
    13,671.72x = 20,509.79 × 5,775.42
  4. Step 4: Simplify right side
    13,671.72x = 118,452,721.05
  5. Step 5: Solve for x
    x = 118,452,721.05/13,671.72
  6. Step 6: Final answer
    x = 8,664.07

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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.