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Finding the Fourth Proportional to 6,480.66, 8,940.66 and 4,089.81

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Solution

The fourth proportional to 6,480.66, 8,940.66 and 4,089.81 is: 5,642.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,480.66 : 8,940.66 = 4,089.81 : x
  2. Step 2: Convert to fraction form
    6,480.66/8,940.66 = 4,089.81/x
  3. Step 3: Cross multiply
    6,480.66x = 8,940.66 × 4,089.81
  4. Step 4: Simplify right side
    6,480.66x = 36,565,600.67
  5. Step 5: Solve for x
    x = 36,565,600.67/6,480.66
  6. Step 6: Final answer
    x = 5,642.26

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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.