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Finding the Fourth Proportional to 13,867.61, 20,773.89 and 6,461.87

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Solution

The fourth proportional to 13,867.61, 20,773.89 and 6,461.87 is: 9,679.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,867.61 : 20,773.89 = 6,461.87 : x
  2. Step 2: Convert to fraction form
    13,867.61/20,773.89 = 6,461.87/x
  3. Step 3: Cross multiply
    13,867.61x = 20,773.89 × 6,461.87
  4. Step 4: Simplify right side
    13,867.61x = 134,238,072.70
  5. Step 5: Solve for x
    x = 134,238,072.70/13,867.61
  6. Step 6: Final answer
    x = 9,679.98

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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.