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Finding the Fourth Proportional to 8,355.72, 12,516.54 and 3,959.84

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Solution

The fourth proportional to 8,355.72, 12,516.54 and 3,959.84 is: 5,931.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,355.72 : 12,516.54 = 3,959.84 : x
  2. Step 2: Convert to fraction form
    8,355.72/12,516.54 = 3,959.84/x
  3. Step 3: Cross multiply
    8,355.72x = 12,516.54 × 3,959.84
  4. Step 4: Simplify right side
    8,355.72x = 49,563,495.75
  5. Step 5: Solve for x
    x = 49,563,495.75/8,355.72
  6. Step 6: Final answer
    x = 5,931.68

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1.5x scale

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.