Home / 5,215-7,195.58-3,091.20

Finding the Fourth Proportional to 5,215, 7,195.58 and 3,091.20

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Solution

The fourth proportional to 5,215, 7,195.58 and 3,091.20 is: 4,265.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,215 : 7,195.58 = 3,091.20 : x
  2. Step 2: Convert to fraction form
    5,215/7,195.58 = 3,091.20/x
  3. Step 3: Cross multiply
    5,215x = 7,195.58 × 3,091.20
  4. Step 4: Simplify right side
    5,215x = 22,242,976.90
  5. Step 5: Solve for x
    x = 22,242,976.90/5,215
  6. Step 6: Final answer
    x = 4,265.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.