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Finding the Fourth Proportional to 8,656.59, 12,985.94 and 3,391.68

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Solution

The fourth proportional to 8,656.59, 12,985.94 and 3,391.68 is: 5,087.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,656.59 : 12,985.94 = 3,391.68 : x
  2. Step 2: Convert to fraction form
    8,656.59/12,985.94 = 3,391.68/x
  3. Step 3: Cross multiply
    8,656.59x = 12,985.94 × 3,391.68
  4. Step 4: Simplify right side
    8,656.59x = 44,044,152.98
  5. Step 5: Solve for x
    x = 44,044,152.98/8,656.59
  6. Step 6: Final answer
    x = 5,087.93

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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.