Home / 20,382.10-30,573.15-9,991.70

Finding the Fourth Proportional to 20,382.10, 30,573.15 and 9,991.70

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Solution

The fourth proportional to 20,382.10, 30,573.15 and 9,991.70 is: 14,987.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,382.10 : 30,573.15 = 9,991.70 : x
  2. Step 2: Convert to fraction form
    20,382.10/30,573.15 = 9,991.70/x
  3. Step 3: Cross multiply
    20,382.10x = 30,573.15 × 9,991.70
  4. Step 4: Simplify right side
    20,382.10x = 305,477,742.86
  5. Step 5: Solve for x
    x = 305,477,742.86/20,382.10
  6. Step 6: Final answer
    x = 14,987.55

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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.