Home / 20,607.40-30,911.10-11,243.80

Finding the Fourth Proportional to 20,607.40, 30,911.10 and 11,243.80

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Solution

The fourth proportional to 20,607.40, 30,911.10 and 11,243.80 is: 16,865.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,607.40 : 30,911.10 = 11,243.80 : x
  2. Step 2: Convert to fraction form
    20,607.40/30,911.10 = 11,243.80/x
  3. Step 3: Cross multiply
    20,607.40x = 30,911.10 × 11,243.80
  4. Step 4: Simplify right side
    20,607.40x = 347,558,226.18
  5. Step 5: Solve for x
    x = 347,558,226.18/20,607.40
  6. Step 6: Final answer
    x = 16,865.70

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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.