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Finding the Fourth Proportional to 8,386.68, 12,579.80 and 2,146.71

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Solution

The fourth proportional to 8,386.68, 12,579.80 and 2,146.71 is: 3,220.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,386.68 : 12,579.80 = 2,146.71 : x
  2. Step 2: Convert to fraction form
    8,386.68/12,579.80 = 2,146.71/x
  3. Step 3: Cross multiply
    8,386.68x = 12,579.80 × 2,146.71
  4. Step 4: Simplify right side
    8,386.68x = 27,005,182.46
  5. Step 5: Solve for x
    x = 27,005,182.46/8,386.68
  6. Step 6: Final answer
    x = 3,220.01

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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.