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Finding the Fourth Proportional to 6,386.20, 8,811.11 and 3,697.20

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Solution

The fourth proportional to 6,386.20, 8,811.11 and 3,697.20 is: 5,101.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,386.20 : 8,811.11 = 3,697.20 : x
  2. Step 2: Convert to fraction form
    6,386.20/8,811.11 = 3,697.20/x
  3. Step 3: Cross multiply
    6,386.20x = 8,811.11 × 3,697.20
  4. Step 4: Simplify right side
    6,386.20x = 32,576,445.14
  5. Step 5: Solve for x
    x = 32,576,445.14/6,386.20
  6. Step 6: Final answer
    x = 5,101.07

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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.