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Finding the Fourth Proportional to 8,622.61, 12,938.82 and 3,356.93

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Solution

The fourth proportional to 8,622.61, 12,938.82 and 3,356.93 is: 5,037.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,622.61 : 12,938.82 = 3,356.93 : x
  2. Step 2: Convert to fraction form
    8,622.61/12,938.82 = 3,356.93/x
  3. Step 3: Cross multiply
    8,622.61x = 12,938.82 × 3,356.93
  4. Step 4: Simplify right side
    8,622.61x = 43,434,726.39
  5. Step 5: Solve for x
    x = 43,434,726.39/8,622.61
  6. Step 6: Final answer
    x = 5,037.31

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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.