Home / 20,639.22-28,483.08-11,685.54

Finding the Fourth Proportional to 20,639.22, 28,483.08 and 11,685.54

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Solution

The fourth proportional to 20,639.22, 28,483.08 and 11,685.54 is: 16,126.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,639.22 : 28,483.08 = 11,685.54 : x
  2. Step 2: Convert to fraction form
    20,639.22/28,483.08 = 11,685.54/x
  3. Step 3: Cross multiply
    20,639.22x = 28,483.08 × 11,685.54
  4. Step 4: Simplify right side
    20,639.22x = 332,840,170.66
  5. Step 5: Solve for x
    x = 332,840,170.66/20,639.22
  6. Step 6: Final answer
    x = 16,126.59

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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.