Home / 18,930.48-28,371.12-10,155.14

Finding the Fourth Proportional to 18,930.48, 28,371.12 and 10,155.14

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Solution

The fourth proportional to 18,930.48, 28,371.12 and 10,155.14 is: 15,219.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,930.48 : 28,371.12 = 10,155.14 : x
  2. Step 2: Convert to fraction form
    18,930.48/28,371.12 = 10,155.14/x
  3. Step 3: Cross multiply
    18,930.48x = 28,371.12 × 10,155.14
  4. Step 4: Simplify right side
    18,930.48x = 288,112,695.56
  5. Step 5: Solve for x
    x = 288,112,695.56/18,930.48
  6. Step 6: Final answer
    x = 15,219.51

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1.5x scale

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.