Home / 20,352.50-28,087.35-11,399.81

Finding the Fourth Proportional to 20,352.50, 28,087.35 and 11,399.81

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Solution

The fourth proportional to 20,352.50, 28,087.35 and 11,399.81 is: 15,732.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,352.50 : 28,087.35 = 11,399.81 : x
  2. Step 2: Convert to fraction form
    20,352.50/28,087.35 = 11,399.81/x
  3. Step 3: Cross multiply
    20,352.50x = 28,087.35 × 11,399.81
  4. Step 4: Simplify right side
    20,352.50x = 320,190,453.40
  5. Step 5: Solve for x
    x = 320,190,453.40/20,352.50
  6. Step 6: Final answer
    x = 15,732.24

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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.