Home / 20,370.54-28,111.25-11,418.05

Finding the Fourth Proportional to 20,370.54, 28,111.25 and 11,418.05

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Solution

The fourth proportional to 20,370.54, 28,111.25 and 11,418.05 is: 15,756.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,370.54 : 28,111.25 = 11,418.05 : x
  2. Step 2: Convert to fraction form
    20,370.54/28,111.25 = 11,418.05/x
  3. Step 3: Cross multiply
    20,370.54x = 28,111.25 × 11,418.05
  4. Step 4: Simplify right side
    20,370.54x = 320,975,658.06
  5. Step 5: Solve for x
    x = 320,975,658.06/20,370.54
  6. Step 6: Final answer
    x = 15,756.86

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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.