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Finding the Fourth Proportional to 10,398.78, 15,598.04 and 6,724.62

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Solution

The fourth proportional to 10,398.78, 15,598.04 and 6,724.62 is: 10,086.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,398.78 : 15,598.04 = 6,724.62 : x
  2. Step 2: Convert to fraction form
    10,398.78/15,598.04 = 6,724.62/x
  3. Step 3: Cross multiply
    10,398.78x = 15,598.04 × 6,724.62
  4. Step 4: Simplify right side
    10,398.78x = 104,890,858.12
  5. Step 5: Solve for x
    x = 104,890,858.12/10,398.78
  6. Step 6: Final answer
    x = 10,086.84

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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.