Home / 20,928.56-28,881.68-11,497.16

Finding the Fourth Proportional to 20,928.56, 28,881.68 and 11,497.16

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Solution

The fourth proportional to 20,928.56, 28,881.68 and 11,497.16 is: 15,866.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,928.56 : 28,881.68 = 11,497.16 : x
  2. Step 2: Convert to fraction form
    20,928.56/28,881.68 = 11,497.16/x
  3. Step 3: Cross multiply
    20,928.56x = 28,881.68 × 11,497.16
  4. Step 4: Simplify right side
    20,928.56x = 332,057,296.03
  5. Step 5: Solve for x
    x = 332,057,296.03/20,928.56
  6. Step 6: Final answer
    x = 15,866.23

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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.