Home / 20,311.85-30,455.47-13,283.38

Finding the Fourth Proportional to 20,311.85, 30,455.47 and 13,283.38

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Solution

The fourth proportional to 20,311.85, 30,455.47 and 13,283.38 is: 19,917.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,311.85 : 30,455.47 = 13,283.38 : x
  2. Step 2: Convert to fraction form
    20,311.85/30,455.47 = 13,283.38/x
  3. Step 3: Cross multiply
    20,311.85x = 30,455.47 × 13,283.38
  4. Step 4: Simplify right side
    20,311.85x = 404,551,581.09
  5. Step 5: Solve for x
    x = 404,551,581.09/20,311.85
  6. Step 6: Final answer
    x = 19,917.02

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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.