Home / 20,950.10-31,435.39-9,857.89

Finding the Fourth Proportional to 20,950.10, 31,435.39 and 9,857.89

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Solution

The fourth proportional to 20,950.10, 31,435.39 and 9,857.89 is: 14,791.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,950.10 : 31,435.39 = 9,857.89 : x
  2. Step 2: Convert to fraction form
    20,950.10/31,435.39 = 9,857.89/x
  3. Step 3: Cross multiply
    20,950.10x = 31,435.39 × 9,857.89
  4. Step 4: Simplify right side
    20,950.10x = 309,886,616.73
  5. Step 5: Solve for x
    x = 309,886,616.73/20,950.10
  6. Step 6: Final answer
    x = 14,791.65

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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.