Home / 20,558.50-28,370.73-11,127.13

Finding the Fourth Proportional to 20,558.50, 28,370.73 and 11,127.13

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Solution

The fourth proportional to 20,558.50, 28,370.73 and 11,127.13 is: 15,355.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,558.50 : 28,370.73 = 11,127.13 : x
  2. Step 2: Convert to fraction form
    20,558.50/28,370.73 = 11,127.13/x
  3. Step 3: Cross multiply
    20,558.50x = 28,370.73 × 11,127.13
  4. Step 4: Simplify right side
    20,558.50x = 315,684,800.90
  5. Step 5: Solve for x
    x = 315,684,800.90/20,558.50
  6. Step 6: Final answer
    x = 15,355.44

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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.