Home / 6,621.78-9,138.16-3,637.90

Finding the Fourth Proportional to 6,621.78, 9,138.16 and 3,637.90

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Solution

The fourth proportional to 6,621.78, 9,138.16 and 3,637.90 is: 5,020.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,621.78 : 9,138.16 = 3,637.90 : x
  2. Step 2: Convert to fraction form
    6,621.78/9,138.16 = 3,637.90/x
  3. Step 3: Cross multiply
    6,621.78x = 9,138.16 × 3,637.90
  4. Step 4: Simplify right side
    6,621.78x = 33,243,712.26
  5. Step 5: Solve for x
    x = 33,243,712.26/6,621.78
  6. Step 6: Final answer
    x = 5,020.36

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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.