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Finding the Fourth Proportional to 45,297.90, 67,922.55 and 18,972.90

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Solution

The fourth proportional to 45,297.90, 67,922.55 and 18,972.90 is: 28,449.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,297.90 : 67,922.55 = 18,972.90 : x
  2. Step 2: Convert to fraction form
    45,297.90/67,922.55 = 18,972.90/x
  3. Step 3: Cross multiply
    45,297.90x = 67,922.55 × 18,972.90
  4. Step 4: Simplify right side
    45,297.90x = 1,288,687,748.90
  5. Step 5: Solve for x
    x = 1,288,687,748.90/45,297.90
  6. Step 6: Final answer
    x = 28,449.17

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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.