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Finding the Fourth Proportional to 6,918.20, 10,388.10 and 4,002.20

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Solution

The fourth proportional to 6,918.20, 10,388.10 and 4,002.20 is: 6,009.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,918.20 : 10,388.10 = 4,002.20 : x
  2. Step 2: Convert to fraction form
    6,918.20/10,388.10 = 4,002.20/x
  3. Step 3: Cross multiply
    6,918.20x = 10,388.10 × 4,002.20
  4. Step 4: Simplify right side
    6,918.20x = 41,575,253.82
  5. Step 5: Solve for x
    x = 41,575,253.82/6,918.20
  6. Step 6: Final answer
    x = 6,009.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.