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Finding the Fourth Proportional to 8,355.71, 12,528.70 and 3,161.99

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Solution

The fourth proportional to 8,355.71, 12,528.70 and 3,161.99 is: 4,741.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,355.71 : 12,528.70 = 3,161.99 : x
  2. Step 2: Convert to fraction form
    8,355.71/12,528.70 = 3,161.99/x
  3. Step 3: Cross multiply
    8,355.71x = 12,528.70 × 3,161.99
  4. Step 4: Simplify right side
    8,355.71x = 39,615,624.11
  5. Step 5: Solve for x
    x = 39,615,624.11/8,355.71
  6. Step 6: Final answer
    x = 4,741.14

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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.