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Finding the Fourth Proportional to 18,891.89, 28,328.05 and 5,563.14

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Solution

The fourth proportional to 18,891.89, 28,328.05 and 5,563.14 is: 8,341.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,891.89 : 28,328.05 = 5,563.14 : x
  2. Step 2: Convert to fraction form
    18,891.89/28,328.05 = 5,563.14/x
  3. Step 3: Cross multiply
    18,891.89x = 28,328.05 × 5,563.14
  4. Step 4: Simplify right side
    18,891.89x = 157,593,016.53
  5. Step 5: Solve for x
    x = 157,593,016.53/18,891.89
  6. Step 6: Final answer
    x = 8,341.84

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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.