Home / 20,729.70-31,094.55-20,583.90

Finding the Fourth Proportional to 20,729.70, 31,094.55 and 20,583.90

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Solution

The fourth proportional to 20,729.70, 31,094.55 and 20,583.90 is: 30,875.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,729.70 : 31,094.55 = 20,583.90 : x
  2. Step 2: Convert to fraction form
    20,729.70/31,094.55 = 20,583.90/x
  3. Step 3: Cross multiply
    20,729.70x = 31,094.55 × 20,583.90
  4. Step 4: Simplify right side
    20,729.70x = 640,047,107.75
  5. Step 5: Solve for x
    x = 640,047,107.75/20,729.70
  6. Step 6: Final answer
    x = 30,875.85

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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.