Home / 19,940.66-29,921.42-12,918.87

Finding the Fourth Proportional to 19,940.66, 29,921.42 and 12,918.87

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Solution

The fourth proportional to 19,940.66, 29,921.42 and 12,918.87 is: 19,385.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,940.66 : 29,921.42 = 12,918.87 : x
  2. Step 2: Convert to fraction form
    19,940.66/29,921.42 = 12,918.87/x
  3. Step 3: Cross multiply
    19,940.66x = 29,921.42 × 12,918.87
  4. Step 4: Simplify right side
    19,940.66x = 386,550,870.60
  5. Step 5: Solve for x
    x = 386,550,870.60/19,940.66
  6. Step 6: Final answer
    x = 19,385.06

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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.