Home / 20,666.40-30,997.20-5,877.60

Finding the Fourth Proportional to 20,666.40, 30,997.20 and 5,877.60

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Solution

The fourth proportional to 20,666.40, 30,997.20 and 5,877.60 is: 8,815.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,666.40 : 30,997.20 = 5,877.60 : x
  2. Step 2: Convert to fraction form
    20,666.40/30,997.20 = 5,877.60/x
  3. Step 3: Cross multiply
    20,666.40x = 30,997.20 × 5,877.60
  4. Step 4: Simplify right side
    20,666.40x = 182,189,142.72
  5. Step 5: Solve for x
    x = 182,189,142.72/20,666.40
  6. Step 6: Final answer
    x = 8,815.72

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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.