Home / 20,558.26-28,370.60-11,127.02

Finding the Fourth Proportional to 20,558.26, 28,370.60 and 11,127.02

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Solution

The fourth proportional to 20,558.26, 28,370.60 and 11,127.02 is: 15,355.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,558.26 : 28,370.60 = 11,127.02 : x
  2. Step 2: Convert to fraction form
    20,558.26/28,370.60 = 11,127.02/x
  3. Step 3: Cross multiply
    20,558.26x = 28,370.60 × 11,127.02
  4. Step 4: Simplify right side
    20,558.26x = 315,680,233.61
  5. Step 5: Solve for x
    x = 315,680,233.61/20,558.26
  6. Step 6: Final answer
    x = 15,355.40

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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.