Home / 20,928.78-28,883.13-11,497.44

Finding the Fourth Proportional to 20,928.78, 28,883.13 and 11,497.44

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Solution

The fourth proportional to 20,928.78, 28,883.13 and 11,497.44 is: 15,867.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,928.78 : 28,883.13 = 11,497.44 : x
  2. Step 2: Convert to fraction form
    20,928.78/28,883.13 = 11,497.44/x
  3. Step 3: Cross multiply
    20,928.78x = 28,883.13 × 11,497.44
  4. Step 4: Simplify right side
    20,928.78x = 332,082,054.19
  5. Step 5: Solve for x
    x = 332,082,054.19/20,928.78
  6. Step 6: Final answer
    x = 15,867.24

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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.