Home / 20,155.76-30,236.77-10,289.70

Finding the Fourth Proportional to 20,155.76, 30,236.77 and 10,289.70

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Solution

The fourth proportional to 20,155.76, 30,236.77 and 10,289.70 is: 15,436.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,155.76 : 30,236.77 = 10,289.70 : x
  2. Step 2: Convert to fraction form
    20,155.76/30,236.77 = 10,289.70/x
  3. Step 3: Cross multiply
    20,155.76x = 30,236.77 × 10,289.70
  4. Step 4: Simplify right side
    20,155.76x = 311,127,292.27
  5. Step 5: Solve for x
    x = 311,127,292.27/20,155.76
  6. Step 6: Final answer
    x = 15,436.15

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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.