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Finding the Fourth Proportional to 18,809.64, 28,169.61 and 10,895.43

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Solution

The fourth proportional to 18,809.64, 28,169.61 and 10,895.43 is: 16,317.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,809.64 : 28,169.61 = 10,895.43 : x
  2. Step 2: Convert to fraction form
    18,809.64/28,169.61 = 10,895.43/x
  3. Step 3: Cross multiply
    18,809.64x = 28,169.61 × 10,895.43
  4. Step 4: Simplify right side
    18,809.64x = 306,920,013.88
  5. Step 5: Solve for x
    x = 306,920,013.88/18,809.64
  6. Step 6: Final answer
    x = 16,317.17

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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.