Home / 20,558.66-28,370.79-11,127.15

Finding the Fourth Proportional to 20,558.66, 28,370.79 and 11,127.15

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Solution

The fourth proportional to 20,558.66, 28,370.79 and 11,127.15 is: 15,355.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,558.66 : 28,370.79 = 11,127.15 : x
  2. Step 2: Convert to fraction form
    20,558.66/28,370.79 = 11,127.15/x
  3. Step 3: Cross multiply
    20,558.66x = 28,370.79 × 11,127.15
  4. Step 4: Simplify right side
    20,558.66x = 315,686,035.95
  5. Step 5: Solve for x
    x = 315,686,035.95/20,558.66
  6. Step 6: Final answer
    x = 15,355.38

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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.