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Finding the Fourth Proportional to 6,479.66, 8,939.28 and 4,088.81

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Solution

The fourth proportional to 6,479.66, 8,939.28 and 4,088.81 is: 5,640.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,479.66 : 8,939.28 = 4,088.81 : x
  2. Step 2: Convert to fraction form
    6,479.66/8,939.28 = 4,088.81/x
  3. Step 3: Cross multiply
    6,479.66x = 8,939.28 × 4,088.81
  4. Step 4: Simplify right side
    6,479.66x = 36,551,039.81
  5. Step 5: Solve for x
    x = 36,551,039.81/6,479.66
  6. Step 6: Final answer
    x = 5,640.89

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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.