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Finding the Fourth Proportional to 18,744.90, 28,117.35 and 4,893.90

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Solution

The fourth proportional to 18,744.90, 28,117.35 and 4,893.90 is: 7,340.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,744.90 : 28,117.35 = 4,893.90 : x
  2. Step 2: Convert to fraction form
    18,744.90/28,117.35 = 4,893.90/x
  3. Step 3: Cross multiply
    18,744.90x = 28,117.35 × 4,893.90
  4. Step 4: Simplify right side
    18,744.90x = 137,603,499.17
  5. Step 5: Solve for x
    x = 137,603,499.17/18,744.90
  6. Step 6: Final answer
    x = 7,340.85

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1.5x scale

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.