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Finding the Fourth Proportional to 8,586.71, 12,871.35 and 4,881.28

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Solution

The fourth proportional to 8,586.71, 12,871.35 and 4,881.28 is: 7,316.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,586.71 : 12,871.35 = 4,881.28 : x
  2. Step 2: Convert to fraction form
    8,586.71/12,871.35 = 4,881.28/x
  3. Step 3: Cross multiply
    8,586.71x = 12,871.35 × 4,881.28
  4. Step 4: Simplify right side
    8,586.71x = 62,828,679.00
  5. Step 5: Solve for x
    x = 62,828,679.00/8,586.71
  6. Step 6: Final answer
    x = 7,316.97

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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.