Home / 20,688.20-30,982.71-11,314.16

Finding the Fourth Proportional to 20,688.20, 30,982.71 and 11,314.16

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Solution

The fourth proportional to 20,688.20, 30,982.71 and 11,314.16 is: 16,944.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,688.20 : 30,982.71 = 11,314.16 : x
  2. Step 2: Convert to fraction form
    20,688.20/30,982.71 = 11,314.16/x
  3. Step 3: Cross multiply
    20,688.20x = 30,982.71 × 11,314.16
  4. Step 4: Simplify right side
    20,688.20x = 350,543,338.17
  5. Step 5: Solve for x
    x = 350,543,338.17/20,688.20
  6. Step 6: Final answer
    x = 16,944.12

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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.