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Finding the Fourth Proportional to 19,866.47, 29,799.09 and 8,170.88

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Solution

The fourth proportional to 19,866.47, 29,799.09 and 8,170.88 is: 12,256.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,866.47 : 29,799.09 = 8,170.88 : x
  2. Step 2: Convert to fraction form
    19,866.47/29,799.09 = 8,170.88/x
  3. Step 3: Cross multiply
    19,866.47x = 29,799.09 × 8,170.88
  4. Step 4: Simplify right side
    19,866.47x = 243,484,639.50
  5. Step 5: Solve for x
    x = 243,484,639.50/19,866.47
  6. Step 6: Final answer
    x = 12,256.06

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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.