Home / 20,785.86-31,178.70-5,203.44

Finding the Fourth Proportional to 20,785.86, 31,178.70 and 5,203.44

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Solution

The fourth proportional to 20,785.86, 31,178.70 and 5,203.44 is: 7,805.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,785.86 : 31,178.70 = 5,203.44 : x
  2. Step 2: Convert to fraction form
    20,785.86/31,178.70 = 5,203.44/x
  3. Step 3: Cross multiply
    20,785.86x = 31,178.70 × 5,203.44
  4. Step 4: Simplify right side
    20,785.86x = 162,236,494.73
  5. Step 5: Solve for x
    x = 162,236,494.73/20,785.86
  6. Step 6: Final answer
    x = 7,805.14

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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.