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Finding the Fourth Proportional to 19,969.80, 29,949.90 and 6,118.92

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Solution

The fourth proportional to 19,969.80, 29,949.90 and 6,118.92 is: 9,176.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,969.80 : 29,949.90 = 6,118.92 : x
  2. Step 2: Convert to fraction form
    19,969.80/29,949.90 = 6,118.92/x
  3. Step 3: Cross multiply
    19,969.80x = 29,949.90 × 6,118.92
  4. Step 4: Simplify right side
    19,969.80x = 183,261,042.11
  5. Step 5: Solve for x
    x = 183,261,042.11/19,969.80
  6. Step 6: Final answer
    x = 9,176.91

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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.