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Finding the Fourth Proportional to 8,411.54, 12,618.93 and 2,865.20

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Solution

The fourth proportional to 8,411.54, 12,618.93 and 2,865.20 is: 4,298.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,411.54 : 12,618.93 = 2,865.20 : x
  2. Step 2: Convert to fraction form
    8,411.54/12,618.93 = 2,865.20/x
  3. Step 3: Cross multiply
    8,411.54x = 12,618.93 × 2,865.20
  4. Step 4: Simplify right side
    8,411.54x = 36,155,758.24
  5. Step 5: Solve for x
    x = 36,155,758.24/8,411.54
  6. Step 6: Final answer
    x = 4,298.35

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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.