Home / 18,631.32-27,919.81-8,639.12

Finding the Fourth Proportional to 18,631.32, 27,919.81 and 8,639.12

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Solution

The fourth proportional to 18,631.32, 27,919.81 and 8,639.12 is: 12,946.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,631.32 : 27,919.81 = 8,639.12 : x
  2. Step 2: Convert to fraction form
    18,631.32/27,919.81 = 8,639.12/x
  3. Step 3: Cross multiply
    18,631.32x = 27,919.81 × 8,639.12
  4. Step 4: Simplify right side
    18,631.32x = 241,202,588.97
  5. Step 5: Solve for x
    x = 241,202,588.97/18,631.32
  6. Step 6: Final answer
    x = 12,946.08

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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.