Home / 20,605.63-30,905.67-5,815.73

Finding the Fourth Proportional to 20,605.63, 30,905.67 and 5,815.73

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Solution

The fourth proportional to 20,605.63, 30,905.67 and 5,815.73 is: 8,722.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,605.63 : 30,905.67 = 5,815.73 : x
  2. Step 2: Convert to fraction form
    20,605.63/30,905.67 = 5,815.73/x
  3. Step 3: Cross multiply
    20,605.63x = 30,905.67 × 5,815.73
  4. Step 4: Simplify right side
    20,605.63x = 179,739,032.19
  5. Step 5: Solve for x
    x = 179,739,032.19/20,605.63
  6. Step 6: Final answer
    x = 8,722.81

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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.