Home / 20,351.22-28,086.45-11,398.56

Finding the Fourth Proportional to 20,351.22, 28,086.45 and 11,398.56

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Solution

The fourth proportional to 20,351.22, 28,086.45 and 11,398.56 is: 15,731.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,351.22 : 28,086.45 = 11,398.56 : x
  2. Step 2: Convert to fraction form
    20,351.22/28,086.45 = 11,398.56/x
  3. Step 3: Cross multiply
    20,351.22x = 28,086.45 × 11,398.56
  4. Step 4: Simplify right side
    20,351.22x = 320,145,085.51
  5. Step 5: Solve for x
    x = 320,145,085.51/20,351.22
  6. Step 6: Final answer
    x = 15,731.00

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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.