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Finding the Fourth Proportional to 19,887.19, 29,830.79 and 8,200.11

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Solution

The fourth proportional to 19,887.19, 29,830.79 and 8,200.11 is: 12,300.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,887.19 : 29,830.79 = 8,200.11 : x
  2. Step 2: Convert to fraction form
    19,887.19/29,830.79 = 8,200.11/x
  3. Step 3: Cross multiply
    19,887.19x = 29,830.79 × 8,200.11
  4. Step 4: Simplify right side
    19,887.19x = 244,615,759.39
  5. Step 5: Solve for x
    x = 244,615,759.39/19,887.19
  6. Step 6: Final answer
    x = 12,300.17

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Similar ratio
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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.