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Finding the Fourth Proportional to 18,744.95, 28,117.16 and 4,893.95

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Solution

The fourth proportional to 18,744.95, 28,117.16 and 4,893.95 is: 7,340.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,744.95 : 28,117.16 = 4,893.95 : x
  2. Step 2: Convert to fraction form
    18,744.95/28,117.16 = 4,893.95/x
  3. Step 3: Cross multiply
    18,744.95x = 28,117.16 × 4,893.95
  4. Step 4: Simplify right side
    18,744.95x = 137,603,950.71
  5. Step 5: Solve for x
    x = 137,603,950.71/18,744.95
  6. Step 6: Final answer
    x = 7,340.85

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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.