Home / 20,982.11-28,955.32-11,550.67

Finding the Fourth Proportional to 20,982.11, 28,955.32 and 11,550.67

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Solution

The fourth proportional to 20,982.11, 28,955.32 and 11,550.67 is: 15,939.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,982.11 : 28,955.32 = 11,550.67 : x
  2. Step 2: Convert to fraction form
    20,982.11/28,955.32 = 11,550.67/x
  3. Step 3: Cross multiply
    20,982.11x = 28,955.32 × 11,550.67
  4. Step 4: Simplify right side
    20,982.11x = 334,453,346.06
  5. Step 5: Solve for x
    x = 334,453,346.06/20,982.11
  6. Step 6: Final answer
    x = 15,939.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.