Home / 19,287.97-28,912.10-8,765.30

Finding the Fourth Proportional to 19,287.97, 28,912.10 and 8,765.30

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Solution

The fourth proportional to 19,287.97, 28,912.10 and 8,765.30 is: 13,138.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,287.97 : 28,912.10 = 8,765.30 : x
  2. Step 2: Convert to fraction form
    19,287.97/28,912.10 = 8,765.30/x
  3. Step 3: Cross multiply
    19,287.97x = 28,912.10 × 8,765.30
  4. Step 4: Simplify right side
    19,287.97x = 253,423,324.32
  5. Step 5: Solve for x
    x = 253,423,324.32/19,287.97
  6. Step 6: Final answer
    x = 13,138.93

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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.