Home / 5,109.29-7,662.41-1,989.77

Finding the Fourth Proportional to 5,109.29, 7,662.41 and 1,989.77

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Solution

The fourth proportional to 5,109.29, 7,662.41 and 1,989.77 is: 2,984.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,109.29 : 7,662.41 = 1,989.77 : x
  2. Step 2: Convert to fraction form
    5,109.29/7,662.41 = 1,989.77/x
  3. Step 3: Cross multiply
    5,109.29x = 7,662.41 × 1,989.77
  4. Step 4: Simplify right side
    5,109.29x = 15,246,442.75
  5. Step 5: Solve for x
    x = 15,246,442.75/5,109.29
  6. Step 6: Final answer
    x = 2,984.07

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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.