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Finding the Fourth Proportional to 19,810.80, 29,716.20 and 5,959.80

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Solution

The fourth proportional to 19,810.80, 29,716.20 and 5,959.80 is: 8,939.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,810.80 : 29,716.20 = 5,959.80 : x
  2. Step 2: Convert to fraction form
    19,810.80/29,716.20 = 5,959.80/x
  3. Step 3: Cross multiply
    19,810.80x = 29,716.20 × 5,959.80
  4. Step 4: Simplify right side
    19,810.80x = 177,102,608.76
  5. Step 5: Solve for x
    x = 177,102,608.76/19,810.80
  6. Step 6: Final answer
    x = 8,939.70

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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.