Home / 20,909.37-28,849.32-12,404.40

Finding the Fourth Proportional to 20,909.37, 28,849.32 and 12,404.40

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Solution

The fourth proportional to 20,909.37, 28,849.32 and 12,404.40 is: 17,114.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,909.37 : 28,849.32 = 12,404.40 : x
  2. Step 2: Convert to fraction form
    20,909.37/28,849.32 = 12,404.40/x
  3. Step 3: Cross multiply
    20,909.37x = 28,849.32 × 12,404.40
  4. Step 4: Simplify right side
    20,909.37x = 357,858,505.01
  5. Step 5: Solve for x
    x = 357,858,505.01/20,909.37
  6. Step 6: Final answer
    x = 17,114.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.