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Finding the Fourth Proportional to 19,213.00, 28,819.29 and 4,981.40

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Solution

The fourth proportional to 19,213.00, 28,819.29 and 4,981.40 is: 7,472.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,213.00 : 28,819.29 = 4,981.40 : x
  2. Step 2: Convert to fraction form
    19,213.00/28,819.29 = 4,981.40/x
  3. Step 3: Cross multiply
    19,213.00x = 28,819.29 × 4,981.40
  4. Step 4: Simplify right side
    19,213.00x = 143,560,393.86
  5. Step 5: Solve for x
    x = 143,560,393.86/19,213.00
  6. Step 6: Final answer
    x = 7,472.05

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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.