Home / 20,855.87-31,261.91-9,753.20

Finding the Fourth Proportional to 20,855.87, 31,261.91 and 9,753.20

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Solution

The fourth proportional to 20,855.87, 31,261.91 and 9,753.20 is: 14,619.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,855.87 : 31,261.91 = 9,753.20 : x
  2. Step 2: Convert to fraction form
    20,855.87/31,261.91 = 9,753.20/x
  3. Step 3: Cross multiply
    20,855.87x = 31,261.91 × 9,753.20
  4. Step 4: Simplify right side
    20,855.87x = 304,903,455.54
  5. Step 5: Solve for x
    x = 304,903,455.54/20,855.87
  6. Step 6: Final answer
    x = 14,619.55

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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.