Home / 6,642.72-9,165.69-3,989.16

Finding the Fourth Proportional to 6,642.72, 9,165.69 and 3,989.16

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Solution

The fourth proportional to 6,642.72, 9,165.69 and 3,989.16 is: 5,504.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,642.72 : 9,165.69 = 3,989.16 : x
  2. Step 2: Convert to fraction form
    6,642.72/9,165.69 = 3,989.16/x
  3. Step 3: Cross multiply
    6,642.72x = 9,165.69 × 3,989.16
  4. Step 4: Simplify right side
    6,642.72x = 36,563,403.92
  5. Step 5: Solve for x
    x = 36,563,403.92/6,642.72
  6. Step 6: Final answer
    x = 5,504.28

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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.