Home / 13,445.75-20,168.61-4,085.74

Finding the Fourth Proportional to 13,445.75, 20,168.61 and 4,085.74

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Solution

The fourth proportional to 13,445.75, 20,168.61 and 4,085.74 is: 6,128.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,445.75 : 20,168.61 = 4,085.74 : x
  2. Step 2: Convert to fraction form
    13,445.75/20,168.61 = 4,085.74/x
  3. Step 3: Cross multiply
    13,445.75x = 20,168.61 × 4,085.74
  4. Step 4: Simplify right side
    13,445.75x = 82,403,729.49
  5. Step 5: Solve for x
    x = 82,403,729.49/13,445.75
  6. Step 6: Final answer
    x = 6,128.61

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Double scale
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Similar ratio
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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.