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Finding the Fourth Proportional to 6,386.28, 8,813.15 and 3,553.71

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Solution

The fourth proportional to 6,386.28, 8,813.15 and 3,553.71 is: 4,904.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,386.28 : 8,813.15 = 3,553.71 : x
  2. Step 2: Convert to fraction form
    6,386.28/8,813.15 = 3,553.71/x
  3. Step 3: Cross multiply
    6,386.28x = 8,813.15 × 3,553.71
  4. Step 4: Simplify right side
    6,386.28x = 31,319,361.52
  5. Step 5: Solve for x
    x = 31,319,361.52/6,386.28
  6. Step 6: Final answer
    x = 4,904.16

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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.