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Finding the Fourth Proportional to 8,902.52, 12,341.66 and 8,428.51

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Solution

The fourth proportional to 8,902.52, 12,341.66 and 8,428.51 is: 11,684.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,902.52 : 12,341.66 = 8,428.51 : x
  2. Step 2: Convert to fraction form
    8,902.52/12,341.66 = 8,428.51/x
  3. Step 3: Cross multiply
    8,902.52x = 12,341.66 × 8,428.51
  4. Step 4: Simplify right side
    8,902.52x = 104,021,890.80
  5. Step 5: Solve for x
    x = 104,021,890.80/8,902.52
  6. Step 6: Final answer
    x = 11,684.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.