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Finding the Fourth Proportional to 8,721.95, 12,035.97 and 4,742.96

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Solution

The fourth proportional to 8,721.95, 12,035.97 and 4,742.96 is: 6,545.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,721.95 : 12,035.97 = 4,742.96 : x
  2. Step 2: Convert to fraction form
    8,721.95/12,035.97 = 4,742.96/x
  3. Step 3: Cross multiply
    8,721.95x = 12,035.97 × 4,742.96
  4. Step 4: Simplify right side
    8,721.95x = 57,086,064.09
  5. Step 5: Solve for x
    x = 57,086,064.09/8,721.95
  6. Step 6: Final answer
    x = 6,545.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.