Home / 20,450.40-28,220.08-11,499.20

Finding the Fourth Proportional to 20,450.40, 28,220.08 and 11,499.20

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Solution

The fourth proportional to 20,450.40, 28,220.08 and 11,499.20 is: 15,868.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,450.40 : 28,220.08 = 11,499.20 : x
  2. Step 2: Convert to fraction form
    20,450.40/28,220.08 = 11,499.20/x
  3. Step 3: Cross multiply
    20,450.40x = 28,220.08 × 11,499.20
  4. Step 4: Simplify right side
    20,450.40x = 324,508,343.94
  5. Step 5: Solve for x
    x = 324,508,343.94/20,450.40
  6. Step 6: Final answer
    x = 15,868.07

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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.