Home / 20,156.78-30,235.14-6,305.78

Finding the Fourth Proportional to 20,156.78, 30,235.14 and 6,305.78

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Solution

The fourth proportional to 20,156.78, 30,235.14 and 6,305.78 is: 9,458.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,156.78 : 30,235.14 = 6,305.78 : x
  2. Step 2: Convert to fraction form
    20,156.78/30,235.14 = 6,305.78/x
  3. Step 3: Cross multiply
    20,156.78x = 30,235.14 × 6,305.78
  4. Step 4: Simplify right side
    20,156.78x = 190,656,216.70
  5. Step 5: Solve for x
    x = 190,656,216.70/20,156.78
  6. Step 6: Final answer
    x = 9,458.66

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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.