Home / 18,964.90-28,451.31-7,278.04

Finding the Fourth Proportional to 18,964.90, 28,451.31 and 7,278.04

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Solution

The fourth proportional to 18,964.90, 28,451.31 and 7,278.04 is: 10,918.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,964.90 : 28,451.31 = 7,278.04 : x
  2. Step 2: Convert to fraction form
    18,964.90/28,451.31 = 7,278.04/x
  3. Step 3: Cross multiply
    18,964.90x = 28,451.31 × 7,278.04
  4. Step 4: Simplify right side
    18,964.90x = 207,069,772.23
  5. Step 5: Solve for x
    x = 207,069,772.23/18,964.90
  6. Step 6: Final answer
    x = 10,918.58

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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.