Home / 20,717.02-28,589.23-11,285.38

Finding the Fourth Proportional to 20,717.02, 28,589.23 and 11,285.38

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Solution

The fourth proportional to 20,717.02, 28,589.23 and 11,285.38 is: 15,573.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,717.02 : 28,589.23 = 11,285.38 : x
  2. Step 2: Convert to fraction form
    20,717.02/28,589.23 = 11,285.38/x
  3. Step 3: Cross multiply
    20,717.02x = 28,589.23 × 11,285.38
  4. Step 4: Simplify right side
    20,717.02x = 322,640,324.46
  5. Step 5: Solve for x
    x = 322,640,324.46/20,717.02
  6. Step 6: Final answer
    x = 15,573.68

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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.