Home / 20,379.60-30,540.24-19,329.84

Finding the Fourth Proportional to 20,379.60, 30,540.24 and 19,329.84

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Solution

The fourth proportional to 20,379.60, 30,540.24 and 19,329.84 is: 28,967.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,379.60 : 30,540.24 = 19,329.84 : x
  2. Step 2: Convert to fraction form
    20,379.60/30,540.24 = 19,329.84/x
  3. Step 3: Cross multiply
    20,379.60x = 30,540.24 × 19,329.84
  4. Step 4: Simplify right side
    20,379.60x = 590,337,952.76
  5. Step 5: Solve for x
    x = 590,337,952.76/20,379.60
  6. Step 6: Final answer
    x = 28,967.10

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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.