Home / 20,719.89-28,593.66-11,288.45

Finding the Fourth Proportional to 20,719.89, 28,593.66 and 11,288.45

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Solution

The fourth proportional to 20,719.89, 28,593.66 and 11,288.45 is: 15,578.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,719.89 : 28,593.66 = 11,288.45 : x
  2. Step 2: Convert to fraction form
    20,719.89/28,593.66 = 11,288.45/x
  3. Step 3: Cross multiply
    20,719.89x = 28,593.66 × 11,288.45
  4. Step 4: Simplify right side
    20,719.89x = 322,777,958.26
  5. Step 5: Solve for x
    x = 322,777,958.26/20,719.89
  6. Step 6: Final answer
    x = 15,578.17

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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.