Home / 20,908.18-28,843.59-13,350.66

Finding the Fourth Proportional to 20,908.18, 28,843.59 and 13,350.66

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Solution

The fourth proportional to 20,908.18, 28,843.59 and 13,350.66 is: 18,417.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,908.18 : 28,843.59 = 13,350.66 : x
  2. Step 2: Convert to fraction form
    20,908.18/28,843.59 = 13,350.66/x
  3. Step 3: Cross multiply
    20,908.18x = 28,843.59 × 13,350.66
  4. Step 4: Simplify right side
    20,908.18x = 385,080,963.27
  5. Step 5: Solve for x
    x = 385,080,963.27/20,908.18
  6. Step 6: Final answer
    x = 18,417.72

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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.