Home / 20,311.35-30,456.09-10,956.39

Finding the Fourth Proportional to 20,311.35, 30,456.09 and 10,956.39

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Solution

The fourth proportional to 20,311.35, 30,456.09 and 10,956.39 is: 16,428.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,311.35 : 30,456.09 = 10,956.39 : x
  2. Step 2: Convert to fraction form
    20,311.35/30,456.09 = 10,956.39/x
  3. Step 3: Cross multiply
    20,311.35x = 30,456.09 × 10,956.39
  4. Step 4: Simplify right side
    20,311.35x = 333,688,799.92
  5. Step 5: Solve for x
    x = 333,688,799.92/20,311.35
  6. Step 6: Final answer
    x = 16,428.69

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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.