Home / 20,370.17-28,110.30-11,418.25

Finding the Fourth Proportional to 20,370.17, 28,110.30 and 11,418.25

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Solution

The fourth proportional to 20,370.17, 28,110.30 and 11,418.25 is: 15,756.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,370.17 : 28,110.30 = 11,418.25 : x
  2. Step 2: Convert to fraction form
    20,370.17/28,110.30 = 11,418.25/x
  3. Step 3: Cross multiply
    20,370.17x = 28,110.30 × 11,418.25
  4. Step 4: Simplify right side
    20,370.17x = 320,970,432.98
  5. Step 5: Solve for x
    x = 320,970,432.98/20,370.17
  6. Step 6: Final answer
    x = 15,756.89

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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.