Home / 20,318.62-28,039.77-11,365.55

Finding the Fourth Proportional to 20,318.62, 28,039.77 and 11,365.55

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Solution

The fourth proportional to 20,318.62, 28,039.77 and 11,365.55 is: 15,684.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,318.62 : 28,039.77 = 11,365.55 : x
  2. Step 2: Convert to fraction form
    20,318.62/28,039.77 = 11,365.55/x
  3. Step 3: Cross multiply
    20,318.62x = 28,039.77 × 11,365.55
  4. Step 4: Simplify right side
    20,318.62x = 318,687,407.92
  5. Step 5: Solve for x
    x = 318,687,407.92/20,318.62
  6. Step 6: Final answer
    x = 15,684.50

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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.