Home / 21,112.07-31,605.01-12,766.85

Finding the Fourth Proportional to 21,112.07, 31,605.01 and 12,766.85

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Solution

The fourth proportional to 21,112.07, 31,605.01 and 12,766.85 is: 19,112.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,112.07 : 31,605.01 = 12,766.85 : x
  2. Step 2: Convert to fraction form
    21,112.07/31,605.01 = 12,766.85/x
  3. Step 3: Cross multiply
    21,112.07x = 31,605.01 × 12,766.85
  4. Step 4: Simplify right side
    21,112.07x = 403,496,231.98
  5. Step 5: Solve for x
    x = 403,496,231.98/21,112.07
  6. Step 6: Final answer
    x = 19,112.11

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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.