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Finding the Fourth Proportional to 18,733.38, 28,102.77 and 7,640.70

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Solution

The fourth proportional to 18,733.38, 28,102.77 and 7,640.70 is: 11,462.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,733.38 : 28,102.77 = 7,640.70 : x
  2. Step 2: Convert to fraction form
    18,733.38/28,102.77 = 7,640.70/x
  3. Step 3: Cross multiply
    18,733.38x = 28,102.77 × 7,640.70
  4. Step 4: Simplify right side
    18,733.38x = 214,724,834.74
  5. Step 5: Solve for x
    x = 214,724,834.74/18,733.38
  6. Step 6: Final answer
    x = 11,462.15

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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.