Home / 20,909.93-28,842.57-12,406.03

Finding the Fourth Proportional to 20,909.93, 28,842.57 and 12,406.03

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Solution

The fourth proportional to 20,909.93, 28,842.57 and 12,406.03 is: 17,112.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,909.93 : 28,842.57 = 12,406.03 : x
  2. Step 2: Convert to fraction form
    20,909.93/28,842.57 = 12,406.03/x
  3. Step 3: Cross multiply
    20,909.93x = 28,842.57 × 12,406.03
  4. Step 4: Simplify right side
    20,909.93x = 357,821,716.59
  5. Step 5: Solve for x
    x = 357,821,716.59/20,909.93
  6. Step 6: Final answer
    x = 17,112.53

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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.