Home / 6,623.78-9,140.92-3,639.90

Finding the Fourth Proportional to 6,623.78, 9,140.92 and 3,639.90

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Solution

The fourth proportional to 6,623.78, 9,140.92 and 3,639.90 is: 5,023.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,623.78 : 9,140.92 = 3,639.90 : x
  2. Step 2: Convert to fraction form
    6,623.78/9,140.92 = 3,639.90/x
  3. Step 3: Cross multiply
    6,623.78x = 9,140.92 × 3,639.90
  4. Step 4: Simplify right side
    6,623.78x = 33,272,034.71
  5. Step 5: Solve for x
    x = 33,272,034.71/6,623.78
  6. Step 6: Final answer
    x = 5,023.12

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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.