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Finding the Fourth Proportional to 20,656.55, 30,935.56 and 11,282.56

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Solution

The fourth proportional to 20,656.55, 30,935.56 and 11,282.56 is: 16,896.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,656.55 : 30,935.56 = 11,282.56 : x
  2. Step 2: Convert to fraction form
    20,656.55/30,935.56 = 11,282.56/x
  3. Step 3: Cross multiply
    20,656.55x = 30,935.56 × 11,282.56
  4. Step 4: Simplify right side
    20,656.55x = 349,032,311.83
  5. Step 5: Solve for x
    x = 349,032,311.83/20,656.55
  6. Step 6: Final answer
    x = 16,896.93

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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.