Home / 20,370.40-28,111.94-11,417.96

Finding the Fourth Proportional to 20,370.40, 28,111.94 and 11,417.96

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Solution

The fourth proportional to 20,370.40, 28,111.94 and 11,417.96 is: 15,757.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,370.40 : 28,111.94 = 11,417.96 : x
  2. Step 2: Convert to fraction form
    20,370.40/28,111.94 = 11,417.96/x
  3. Step 3: Cross multiply
    20,370.40x = 28,111.94 × 11,417.96
  4. Step 4: Simplify right side
    20,370.40x = 320,981,006.44
  5. Step 5: Solve for x
    x = 320,981,006.44/20,370.40
  6. Step 6: Final answer
    x = 15,757.23

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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.