Home / 20,302.40-30,421.20-16,997.60

Finding the Fourth Proportional to 20,302.40, 30,421.20 and 16,997.60

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Solution

The fourth proportional to 20,302.40, 30,421.20 and 16,997.60 is: 25,469.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,302.40 : 30,421.20 = 16,997.60 : x
  2. Step 2: Convert to fraction form
    20,302.40/30,421.20 = 16,997.60/x
  3. Step 3: Cross multiply
    20,302.40x = 30,421.20 × 16,997.60
  4. Step 4: Simplify right side
    20,302.40x = 517,087,389.12
  5. Step 5: Solve for x
    x = 517,087,389.12/20,302.40
  6. Step 6: Final answer
    x = 25,469.27

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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.