Home / 20,509.94-30,755.28-12,191.06

Finding the Fourth Proportional to 20,509.94, 30,755.28 and 12,191.06

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Solution

The fourth proportional to 20,509.94, 30,755.28 and 12,191.06 is: 18,280.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,509.94 : 30,755.28 = 12,191.06 : x
  2. Step 2: Convert to fraction form
    20,509.94/30,755.28 = 12,191.06/x
  3. Step 3: Cross multiply
    20,509.94x = 30,755.28 × 12,191.06
  4. Step 4: Simplify right side
    20,509.94x = 374,939,463.80
  5. Step 5: Solve for x
    x = 374,939,463.80/20,509.94
  6. Step 6: Final answer
    x = 18,280.87

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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.