Home / 20,455.60-30,640.20-18,266.80

Finding the Fourth Proportional to 20,455.60, 30,640.20 and 18,266.80

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Solution

The fourth proportional to 20,455.60, 30,640.20 and 18,266.80 is: 27,361.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,455.60 : 30,640.20 = 18,266.80 : x
  2. Step 2: Convert to fraction form
    20,455.60/30,640.20 = 18,266.80/x
  3. Step 3: Cross multiply
    20,455.60x = 30,640.20 × 18,266.80
  4. Step 4: Simplify right side
    20,455.60x = 559,698,405.36
  5. Step 5: Solve for x
    x = 559,698,405.36/20,455.60
  6. Step 6: Final answer
    x = 27,361.62

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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.