Home / 6,621.76-9,138.16-3,637.78

Finding the Fourth Proportional to 6,621.76, 9,138.16 and 3,637.78

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Solution

The fourth proportional to 6,621.76, 9,138.16 and 3,637.78 is: 5,020.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,621.76 : 9,138.16 = 3,637.78 : x
  2. Step 2: Convert to fraction form
    6,621.76/9,138.16 = 3,637.78/x
  3. Step 3: Cross multiply
    6,621.76x = 9,138.16 × 3,637.78
  4. Step 4: Simplify right side
    6,621.76x = 33,242,615.68
  5. Step 5: Solve for x
    x = 33,242,615.68/6,621.76
  6. Step 6: Final answer
    x = 5,020.21

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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.