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Finding the Fourth Proportional to 8,607.78, 12,917.13 and 3,677.45

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Solution

The fourth proportional to 8,607.78, 12,917.13 and 3,677.45 is: 5,518.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,607.78 : 12,917.13 = 3,677.45 : x
  2. Step 2: Convert to fraction form
    8,607.78/12,917.13 = 3,677.45/x
  3. Step 3: Cross multiply
    8,607.78x = 12,917.13 × 3,677.45
  4. Step 4: Simplify right side
    8,607.78x = 47,502,132.01
  5. Step 5: Solve for x
    x = 47,502,132.01/8,607.78
  6. Step 6: Final answer
    x = 5,518.51

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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.