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Finding the Fourth Proportional to 20,347.61, 30,479.44 and 9,786.42

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Solution

The fourth proportional to 20,347.61, 30,479.44 and 9,786.42 is: 14,659.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,347.61 : 30,479.44 = 9,786.42 : x
  2. Step 2: Convert to fraction form
    20,347.61/30,479.44 = 9,786.42/x
  3. Step 3: Cross multiply
    20,347.61x = 30,479.44 × 9,786.42
  4. Step 4: Simplify right side
    20,347.61x = 298,284,595.09
  5. Step 5: Solve for x
    x = 298,284,595.09/20,347.61
  6. Step 6: Final answer
    x = 14,659.44

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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.