Home / 2,647.30-3,657.07-2,115.48

Finding the Fourth Proportional to 2,647.30, 3,657.07 and 2,115.48

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Solution

The fourth proportional to 2,647.30, 3,657.07 and 2,115.48 is: 2,922.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,647.30 : 3,657.07 = 2,115.48 : x
  2. Step 2: Convert to fraction form
    2,647.30/3,657.07 = 2,115.48/x
  3. Step 3: Cross multiply
    2,647.30x = 3,657.07 × 2,115.48
  4. Step 4: Simplify right side
    2,647.30x = 7,736,480.75
  5. Step 5: Solve for x
    x = 7,736,480.75/2,647.30
  6. Step 6: Final answer
    x = 2,922.40

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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.