Home / 20,818.92-31,228.35-5,236.54

Finding the Fourth Proportional to 20,818.92, 31,228.35 and 5,236.54

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Solution

The fourth proportional to 20,818.92, 31,228.35 and 5,236.54 is: 7,854.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,818.92 : 31,228.35 = 5,236.54 : x
  2. Step 2: Convert to fraction form
    20,818.92/31,228.35 = 5,236.54/x
  3. Step 3: Cross multiply
    20,818.92x = 31,228.35 × 5,236.54
  4. Step 4: Simplify right side
    20,818.92x = 163,528,503.91
  5. Step 5: Solve for x
    x = 163,528,503.91/20,818.92
  6. Step 6: Final answer
    x = 7,854.80

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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.