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Finding the Fourth Proportional to 20,642.64, 30,967.44 and 9,544.80

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Solution

The fourth proportional to 20,642.64, 30,967.44 and 9,544.80 is: 14,318.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,642.64 : 30,967.44 = 9,544.80 : x
  2. Step 2: Convert to fraction form
    20,642.64/30,967.44 = 9,544.80/x
  3. Step 3: Cross multiply
    20,642.64x = 30,967.44 × 9,544.80
  4. Step 4: Simplify right side
    20,642.64x = 295,578,021.31
  5. Step 5: Solve for x
    x = 295,578,021.31/20,642.64
  6. Step 6: Final answer
    x = 14,318.81

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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.