Home / 20,370.90-28,112.63-11,418.46

Finding the Fourth Proportional to 20,370.90, 28,112.63 and 11,418.46

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Solution

The fourth proportional to 20,370.90, 28,112.63 and 11,418.46 is: 15,757.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,370.90 : 28,112.63 = 11,418.46 : x
  2. Step 2: Convert to fraction form
    20,370.90/28,112.63 = 11,418.46/x
  3. Step 3: Cross multiply
    20,370.90x = 28,112.63 × 11,418.46
  4. Step 4: Simplify right side
    20,370.90x = 321,002,941.15
  5. Step 5: Solve for x
    x = 321,002,941.15/20,370.90
  6. Step 6: Final answer
    x = 15,757.92

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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.