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Finding the Fourth Proportional to 19,800.80, 29,691.90 and 11,483.18

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Solution

The fourth proportional to 19,800.80, 29,691.90 and 11,483.18 is: 17,219.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,800.80 : 29,691.90 = 11,483.18 : x
  2. Step 2: Convert to fraction form
    19,800.80/29,691.90 = 11,483.18/x
  3. Step 3: Cross multiply
    19,800.80x = 29,691.90 × 11,483.18
  4. Step 4: Simplify right side
    19,800.80x = 340,957,432.24
  5. Step 5: Solve for x
    x = 340,957,432.24/19,800.80
  6. Step 6: Final answer
    x = 17,219.38

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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.