Home / 20,558.17-28,370.33-11,126.80

Finding the Fourth Proportional to 20,558.17, 28,370.33 and 11,126.80

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Solution

The fourth proportional to 20,558.17, 28,370.33 and 11,126.80 is: 15,355.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,558.17 : 28,370.33 = 11,126.80 : x
  2. Step 2: Convert to fraction form
    20,558.17/28,370.33 = 11,126.80/x
  3. Step 3: Cross multiply
    20,558.17x = 28,370.33 × 11,126.80
  4. Step 4: Simplify right side
    20,558.17x = 315,670,987.84
  5. Step 5: Solve for x
    x = 315,670,987.84/20,558.17
  6. Step 6: Final answer
    x = 15,355.01

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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.