Home / 20,909.08-31,364.46-9,219.64

Finding the Fourth Proportional to 20,909.08, 31,364.46 and 9,219.64

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Solution

The fourth proportional to 20,909.08, 31,364.46 and 9,219.64 is: 13,829.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,909.08 : 31,364.46 = 9,219.64 : x
  2. Step 2: Convert to fraction form
    20,909.08/31,364.46 = 9,219.64/x
  3. Step 3: Cross multiply
    20,909.08x = 31,364.46 × 9,219.64
  4. Step 4: Simplify right side
    20,909.08x = 289,169,029.99
  5. Step 5: Solve for x
    x = 289,169,029.99/20,909.08
  6. Step 6: Final answer
    x = 13,829.83

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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.