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Finding the Fourth Proportional to 8,579.79, 12,855.61 and 5,283.50

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Solution

The fourth proportional to 8,579.79, 12,855.61 and 5,283.50 is: 7,916.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,579.79 : 12,855.61 = 5,283.50 : x
  2. Step 2: Convert to fraction form
    8,579.79/12,855.61 = 5,283.50/x
  3. Step 3: Cross multiply
    8,579.79x = 12,855.61 × 5,283.50
  4. Step 4: Simplify right side
    8,579.79x = 67,922,557.76
  5. Step 5: Solve for x
    x = 67,922,557.76/8,579.79
  6. Step 6: Final answer
    x = 7,916.58

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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.