Home / 20,818.13-31,227.21-5,235.75

Finding the Fourth Proportional to 20,818.13, 31,227.21 and 5,235.75

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Solution

The fourth proportional to 20,818.13, 31,227.21 and 5,235.75 is: 7,853.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,818.13 : 31,227.21 = 5,235.75 : x
  2. Step 2: Convert to fraction form
    20,818.13/31,227.21 = 5,235.75/x
  3. Step 3: Cross multiply
    20,818.13x = 31,227.21 × 5,235.75
  4. Step 4: Simplify right side
    20,818.13x = 163,497,864.76
  5. Step 5: Solve for x
    x = 163,497,864.76/20,818.13
  6. Step 6: Final answer
    x = 7,853.63

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.