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Finding the Fourth Proportional to 19,990.52, 29,982.99 and 10,987.46

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Solution

The fourth proportional to 19,990.52, 29,982.99 and 10,987.46 is: 16,479.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,990.52 : 29,982.99 = 10,987.46 : x
  2. Step 2: Convert to fraction form
    19,990.52/29,982.99 = 10,987.46/x
  3. Step 3: Cross multiply
    19,990.52x = 29,982.99 × 10,987.46
  4. Step 4: Simplify right side
    19,990.52x = 329,436,903.31
  5. Step 5: Solve for x
    x = 329,436,903.31/19,990.52
  6. Step 6: Final answer
    x = 16,479.66

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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.