Home / 20,820.66-28,732.47-11,389.23

Finding the Fourth Proportional to 20,820.66, 28,732.47 and 11,389.23

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Solution

The fourth proportional to 20,820.66, 28,732.47 and 11,389.23 is: 15,717.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,820.66 : 28,732.47 = 11,389.23 : x
  2. Step 2: Convert to fraction form
    20,820.66/28,732.47 = 11,389.23/x
  3. Step 3: Cross multiply
    20,820.66x = 28,732.47 × 11,389.23
  4. Step 4: Simplify right side
    20,820.66x = 327,240,709.30
  5. Step 5: Solve for x
    x = 327,240,709.30/20,820.66
  6. Step 6: Final answer
    x = 15,717.12

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.