Home / 20,393.69-28,143.12-11,441.16

Finding the Fourth Proportional to 20,393.69, 28,143.12 and 11,441.16

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Solution

The fourth proportional to 20,393.69, 28,143.12 and 11,441.16 is: 15,788.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,393.69 : 28,143.12 = 11,441.16 : x
  2. Step 2: Convert to fraction form
    20,393.69/28,143.12 = 11,441.16/x
  3. Step 3: Cross multiply
    20,393.69x = 28,143.12 × 11,441.16
  4. Step 4: Simplify right side
    20,393.69x = 321,989,938.82
  5. Step 5: Solve for x
    x = 321,989,938.82/20,393.69
  6. Step 6: Final answer
    x = 15,788.71

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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.