Home / 20,155.29-30,215.58-8,902.09

Finding the Fourth Proportional to 20,155.29, 30,215.58 and 8,902.09

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Solution

The fourth proportional to 20,155.29, 30,215.58 and 8,902.09 is: 13,345.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,155.29 : 30,215.58 = 8,902.09 : x
  2. Step 2: Convert to fraction form
    20,155.29/30,215.58 = 8,902.09/x
  3. Step 3: Cross multiply
    20,155.29x = 30,215.58 × 8,902.09
  4. Step 4: Simplify right side
    20,155.29x = 268,981,812.56
  5. Step 5: Solve for x
    x = 268,981,812.56/20,155.29
  6. Step 6: Final answer
    x = 13,345.47

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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.