Home / 20,581.96-28,403.06-11,150.60

Finding the Fourth Proportional to 20,581.96, 28,403.06 and 11,150.60

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Solution

The fourth proportional to 20,581.96, 28,403.06 and 11,150.60 is: 15,387.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,581.96 : 28,403.06 = 11,150.60 : x
  2. Step 2: Convert to fraction form
    20,581.96/28,403.06 = 11,150.60/x
  3. Step 3: Cross multiply
    20,581.96x = 28,403.06 × 11,150.60
  4. Step 4: Simplify right side
    20,581.96x = 316,711,160.84
  5. Step 5: Solve for x
    x = 316,711,160.84/20,581.96
  6. Step 6: Final answer
    x = 15,387.80

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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.