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Finding the Fourth Proportional to 6,386.79, 9,581.36 and 2,876.88

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Solution

The fourth proportional to 6,386.79, 9,581.36 and 2,876.88 is: 4,315.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,386.79 : 9,581.36 = 2,876.88 : x
  2. Step 2: Convert to fraction form
    6,386.79/9,581.36 = 2,876.88/x
  3. Step 3: Cross multiply
    6,386.79x = 9,581.36 × 2,876.88
  4. Step 4: Simplify right side
    6,386.79x = 27,564,360.67
  5. Step 5: Solve for x
    x = 27,564,360.67/6,386.79
  6. Step 6: Final answer
    x = 4,315.84

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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.