Home / 20,402.50-28,155.97-11,450.69

Finding the Fourth Proportional to 20,402.50, 28,155.97 and 11,450.69

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Solution

The fourth proportional to 20,402.50, 28,155.97 and 11,450.69 is: 15,802.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,402.50 : 28,155.97 = 11,450.69 : x
  2. Step 2: Convert to fraction form
    20,402.50/28,155.97 = 11,450.69/x
  3. Step 3: Cross multiply
    20,402.50x = 28,155.97 × 11,450.69
  4. Step 4: Simplify right side
    20,402.50x = 322,405,284.12
  5. Step 5: Solve for x
    x = 322,405,284.12/20,402.50
  6. Step 6: Final answer
    x = 15,802.24

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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.