Home / 18,998.10-28,488.78-10,111.29

Finding the Fourth Proportional to 18,998.10, 28,488.78 and 10,111.29

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Solution

The fourth proportional to 18,998.10, 28,488.78 and 10,111.29 is: 15,162.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,998.10 : 28,488.78 = 10,111.29 : x
  2. Step 2: Convert to fraction form
    18,998.10/28,488.78 = 10,111.29/x
  3. Step 3: Cross multiply
    18,998.10x = 28,488.78 × 10,111.29
  4. Step 4: Simplify right side
    18,998.10x = 288,058,219.83
  5. Step 5: Solve for x
    x = 288,058,219.83/18,998.10
  6. Step 6: Final answer
    x = 15,162.47

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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.