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Finding the Fourth Proportional to 19,819.61, 29,725.64 and 9,956.15

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Solution

The fourth proportional to 19,819.61, 29,725.64 and 9,956.15 is: 14,932.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,819.61 : 29,725.64 = 9,956.15 : x
  2. Step 2: Convert to fraction form
    19,819.61/29,725.64 = 9,956.15/x
  3. Step 3: Cross multiply
    19,819.61x = 29,725.64 × 9,956.15
  4. Step 4: Simplify right side
    19,819.61x = 295,952,880.91
  5. Step 5: Solve for x
    x = 295,952,880.91/19,819.61
  6. Step 6: Final answer
    x = 14,932.33

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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.