Home / 20,989.60-31,484.40-20,183.20

Finding the Fourth Proportional to 20,989.60, 31,484.40 and 20,183.20

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Solution

The fourth proportional to 20,989.60, 31,484.40 and 20,183.20 is: 30,274.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,989.60 : 31,484.40 = 20,183.20 : x
  2. Step 2: Convert to fraction form
    20,989.60/31,484.40 = 20,183.20/x
  3. Step 3: Cross multiply
    20,989.60x = 31,484.40 × 20,183.20
  4. Step 4: Simplify right side
    20,989.60x = 635,455,942.08
  5. Step 5: Solve for x
    x = 635,455,942.08/20,989.60
  6. Step 6: Final answer
    x = 30,274.80

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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.