Home / 20,717.18-28,589.79-11,285.66

Finding the Fourth Proportional to 20,717.18, 28,589.79 and 11,285.66

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Solution

The fourth proportional to 20,717.18, 28,589.79 and 11,285.66 is: 15,574.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,717.18 : 28,589.79 = 11,285.66 : x
  2. Step 2: Convert to fraction form
    20,717.18/28,589.79 = 11,285.66/x
  3. Step 3: Cross multiply
    20,717.18x = 28,589.79 × 11,285.66
  4. Step 4: Simplify right side
    20,717.18x = 322,654,649.41
  5. Step 5: Solve for x
    x = 322,654,649.41/20,717.18
  6. Step 6: Final answer
    x = 15,574.26

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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.