Home / 18,645.20-25,731.24-12,683.60

Finding the Fourth Proportional to 18,645.20, 25,731.24 and 12,683.60

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Solution

The fourth proportional to 18,645.20, 25,731.24 and 12,683.60 is: 17,503.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,645.20 : 25,731.24 = 12,683.60 : x
  2. Step 2: Convert to fraction form
    18,645.20/25,731.24 = 12,683.60/x
  3. Step 3: Cross multiply
    18,645.20x = 25,731.24 × 12,683.60
  4. Step 4: Simplify right side
    18,645.20x = 326,364,755.66
  5. Step 5: Solve for x
    x = 326,364,755.66/18,645.20
  6. Step 6: Final answer
    x = 17,503.96

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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.