Home / 20,882.56-28,829.78-13,228.06

Finding the Fourth Proportional to 20,882.56, 28,829.78 and 13,228.06

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Solution

The fourth proportional to 20,882.56, 28,829.78 and 13,228.06 is: 18,262.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,882.56 : 28,829.78 = 13,228.06 : x
  2. Step 2: Convert to fraction form
    20,882.56/28,829.78 = 13,228.06/x
  3. Step 3: Cross multiply
    20,882.56x = 28,829.78 × 13,228.06
  4. Step 4: Simplify right side
    20,882.56x = 381,362,059.63
  5. Step 5: Solve for x
    x = 381,362,059.63/20,882.56
  6. Step 6: Final answer
    x = 18,262.23

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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.