Home / 5,155.47-7,731.90-1,992.27

Finding the Fourth Proportional to 5,155.47, 7,731.90 and 1,992.27

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Solution

The fourth proportional to 5,155.47, 7,731.90 and 1,992.27 is: 2,987.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,155.47 : 7,731.90 = 1,992.27 : x
  2. Step 2: Convert to fraction form
    5,155.47/7,731.90 = 1,992.27/x
  3. Step 3: Cross multiply
    5,155.47x = 7,731.90 × 1,992.27
  4. Step 4: Simplify right side
    5,155.47x = 15,404,032.41
  5. Step 5: Solve for x
    x = 15,404,032.41/5,155.47
  6. Step 6: Final answer
    x = 2,987.90

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1.5x scale

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.