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Finding the Fourth Proportional to 18,637.87, 27,919.90 and 12,068.68

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Solution

The fourth proportional to 18,637.87, 27,919.90 and 12,068.68 is: 18,079.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,637.87 : 27,919.90 = 12,068.68 : x
  2. Step 2: Convert to fraction form
    18,637.87/27,919.90 = 12,068.68/x
  3. Step 3: Cross multiply
    18,637.87x = 27,919.90 × 12,068.68
  4. Step 4: Simplify right side
    18,637.87x = 336,956,138.79
  5. Step 5: Solve for x
    x = 336,956,138.79/18,637.87
  6. Step 6: Final answer
    x = 18,079.12

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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.