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Finding the Fourth Proportional to 18,910.70, 28,366.05 and 5,059.70

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Solution

The fourth proportional to 18,910.70, 28,366.05 and 5,059.70 is: 7,589.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,910.70 : 28,366.05 = 5,059.70 : x
  2. Step 2: Convert to fraction form
    18,910.70/28,366.05 = 5,059.70/x
  3. Step 3: Cross multiply
    18,910.70x = 28,366.05 × 5,059.70
  4. Step 4: Simplify right side
    18,910.70x = 143,523,703.19
  5. Step 5: Solve for x
    x = 143,523,703.19/18,910.70
  6. Step 6: Final answer
    x = 7,589.55

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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.