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Finding the Fourth Proportional to 6,386.55, 8,813.61 and 3,868.13

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Solution

The fourth proportional to 6,386.55, 8,813.61 and 3,868.13 is: 5,338.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,386.55 : 8,813.61 = 3,868.13 : x
  2. Step 2: Convert to fraction form
    6,386.55/8,813.61 = 3,868.13/x
  3. Step 3: Cross multiply
    6,386.55x = 8,813.61 × 3,868.13
  4. Step 4: Simplify right side
    6,386.55x = 34,092,145.18
  5. Step 5: Solve for x
    x = 34,092,145.18/6,386.55
  6. Step 6: Final answer
    x = 5,338.12

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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.