Home / 20,922.50-31,381.44-6,131.57

Finding the Fourth Proportional to 20,922.50, 31,381.44 and 6,131.57

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Solution

The fourth proportional to 20,922.50, 31,381.44 and 6,131.57 is: 9,196.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,922.50 : 31,381.44 = 6,131.57 : x
  2. Step 2: Convert to fraction form
    20,922.50/31,381.44 = 6,131.57/x
  3. Step 3: Cross multiply
    20,922.50x = 31,381.44 × 6,131.57
  4. Step 4: Simplify right side
    20,922.50x = 192,417,339.15
  5. Step 5: Solve for x
    x = 192,417,339.15/20,922.50
  6. Step 6: Final answer
    x = 9,196.67

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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.