Home / 20,280.54-27,984.15-11,899.74

Finding the Fourth Proportional to 20,280.54, 27,984.15 and 11,899.74

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Solution

The fourth proportional to 20,280.54, 27,984.15 and 11,899.74 is: 16,419.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,280.54 : 27,984.15 = 11,899.74 : x
  2. Step 2: Convert to fraction form
    20,280.54/27,984.15 = 11,899.74/x
  3. Step 3: Cross multiply
    20,280.54x = 27,984.15 × 11,899.74
  4. Step 4: Simplify right side
    20,280.54x = 333,004,109.12
  5. Step 5: Solve for x
    x = 333,004,109.12/20,280.54
  6. Step 6: Final answer
    x = 16,419.88

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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.