Home / 20,950.94-31,383.95-9,690.30

Finding the Fourth Proportional to 20,950.94, 31,383.95 and 9,690.30

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Solution

The fourth proportional to 20,950.94, 31,383.95 and 9,690.30 is: 14,515.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,950.94 : 31,383.95 = 9,690.30 : x
  2. Step 2: Convert to fraction form
    20,950.94/31,383.95 = 9,690.30/x
  3. Step 3: Cross multiply
    20,950.94x = 31,383.95 × 9,690.30
  4. Step 4: Simplify right side
    20,950.94x = 304,119,890.69
  5. Step 5: Solve for x
    x = 304,119,890.69/20,950.94
  6. Step 6: Final answer
    x = 14,515.81

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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.