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Finding the Fourth Proportional to 18,902.91, 28,355.96 and 5,755.40

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Solution

The fourth proportional to 18,902.91, 28,355.96 and 5,755.40 is: 8,633.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,902.91 : 28,355.96 = 5,755.40 : x
  2. Step 2: Convert to fraction form
    18,902.91/28,355.96 = 5,755.40/x
  3. Step 3: Cross multiply
    18,902.91x = 28,355.96 × 5,755.40
  4. Step 4: Simplify right side
    18,902.91x = 163,199,892.18
  5. Step 5: Solve for x
    x = 163,199,892.18/18,902.91
  6. Step 6: Final answer
    x = 8,633.59

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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.