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Finding the Fourth Proportional to 19,957.10, 29,939.70 and 6,810.80

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Solution

The fourth proportional to 19,957.10, 29,939.70 and 6,810.80 is: 10,217.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,957.10 : 29,939.70 = 6,810.80 : x
  2. Step 2: Convert to fraction form
    19,957.10/29,939.70 = 6,810.80/x
  3. Step 3: Cross multiply
    19,957.10x = 29,939.70 × 6,810.80
  4. Step 4: Simplify right side
    19,957.10x = 203,913,308.76
  5. Step 5: Solve for x
    x = 203,913,308.76/19,957.10
  6. Step 6: Final answer
    x = 10,217.58

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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.