Home / 20,558.88-28,371.26-11,127.45

Finding the Fourth Proportional to 20,558.88, 28,371.26 and 11,127.45

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Solution

The fourth proportional to 20,558.88, 28,371.26 and 11,127.45 is: 15,355.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,558.88 : 28,371.26 = 11,127.45 : x
  2. Step 2: Convert to fraction form
    20,558.88/28,371.26 = 11,127.45/x
  3. Step 3: Cross multiply
    20,558.88x = 28,371.26 × 11,127.45
  4. Step 4: Simplify right side
    20,558.88x = 315,699,721.45
  5. Step 5: Solve for x
    x = 315,699,721.45/20,558.88
  6. Step 6: Final answer
    x = 15,355.88

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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.