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Finding the Fourth Proportional to 8,356.71, 12,530.20 and 3,162.99

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Solution

The fourth proportional to 8,356.71, 12,530.20 and 3,162.99 is: 4,742.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,356.71 : 12,530.20 = 3,162.99 : x
  2. Step 2: Convert to fraction form
    8,356.71/12,530.20 = 3,162.99/x
  3. Step 3: Cross multiply
    8,356.71x = 12,530.20 × 3,162.99
  4. Step 4: Simplify right side
    8,356.71x = 39,632,897.30
  5. Step 5: Solve for x
    x = 39,632,897.30/8,356.71
  6. Step 6: Final answer
    x = 4,742.64

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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.