Home / 20,142.40-30,181.20-16,837.60

Finding the Fourth Proportional to 20,142.40, 30,181.20 and 16,837.60

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Solution

The fourth proportional to 20,142.40, 30,181.20 and 16,837.60 is: 25,229.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,142.40 : 30,181.20 = 16,837.60 : x
  2. Step 2: Convert to fraction form
    20,142.40/30,181.20 = 16,837.60/x
  3. Step 3: Cross multiply
    20,142.40x = 30,181.20 × 16,837.60
  4. Step 4: Simplify right side
    20,142.40x = 508,178,973.12
  5. Step 5: Solve for x
    x = 508,178,973.12/20,142.40
  6. Step 6: Final answer
    x = 25,229.32

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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.