Home / 20,480.40-30,688.20-17,175.60

Finding the Fourth Proportional to 20,480.40, 30,688.20 and 17,175.60

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Solution

The fourth proportional to 20,480.40, 30,688.20 and 17,175.60 is: 25,736.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,480.40 : 30,688.20 = 17,175.60 : x
  2. Step 2: Convert to fraction form
    20,480.40/30,688.20 = 17,175.60/x
  3. Step 3: Cross multiply
    20,480.40x = 30,688.20 × 17,175.60
  4. Step 4: Simplify right side
    20,480.40x = 527,088,247.92
  5. Step 5: Solve for x
    x = 527,088,247.92/20,480.40
  6. Step 6: Final answer
    x = 25,736.23

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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.