Home / 18,640.20-25,723.74-10,142.58

Finding the Fourth Proportional to 18,640.20, 25,723.74 and 10,142.58

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Solution

The fourth proportional to 18,640.20, 25,723.74 and 10,142.58 is: 13,996.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,640.20 : 25,723.74 = 10,142.58 : x
  2. Step 2: Convert to fraction form
    18,640.20/25,723.74 = 10,142.58/x
  3. Step 3: Cross multiply
    18,640.20x = 25,723.74 × 10,142.58
  4. Step 4: Simplify right side
    18,640.20x = 260,905,090.85
  5. Step 5: Solve for x
    x = 260,905,090.85/18,640.20
  6. Step 6: Final answer
    x = 13,996.90

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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.