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Finding the Fourth Proportional to 6,387.68, 9,581.70 and 2,005.40

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Solution

The fourth proportional to 6,387.68, 9,581.70 and 2,005.40 is: 3,008.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,387.68 : 9,581.70 = 2,005.40 : x
  2. Step 2: Convert to fraction form
    6,387.68/9,581.70 = 2,005.40/x
  3. Step 3: Cross multiply
    6,387.68x = 9,581.70 × 2,005.40
  4. Step 4: Simplify right side
    6,387.68x = 19,215,141.18
  5. Step 5: Solve for x
    x = 19,215,141.18/6,387.68
  6. Step 6: Final answer
    x = 3,008.16

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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.