Home / 20,909.85-31,364.60-9,223.08

Finding the Fourth Proportional to 20,909.85, 31,364.60 and 9,223.08

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Solution

The fourth proportional to 20,909.85, 31,364.60 and 9,223.08 is: 13,834.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,909.85 : 31,364.60 = 9,223.08 : x
  2. Step 2: Convert to fraction form
    20,909.85/31,364.60 = 9,223.08/x
  3. Step 3: Cross multiply
    20,909.85x = 31,364.60 × 9,223.08
  4. Step 4: Simplify right side
    20,909.85x = 289,278,168.85
  5. Step 5: Solve for x
    x = 289,278,168.85/20,909.85
  6. Step 6: Final answer
    x = 13,834.54

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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.