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Finding the Fourth Proportional to 31,259.66, 46,889.70 and 12,791.66

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Solution

The fourth proportional to 31,259.66, 46,889.70 and 12,791.66 is: 19,187.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,259.66 : 46,889.70 = 12,791.66 : x
  2. Step 2: Convert to fraction form
    31,259.66/46,889.70 = 12,791.66/x
  3. Step 3: Cross multiply
    31,259.66x = 46,889.70 × 12,791.66
  4. Step 4: Simplify right side
    31,259.66x = 599,797,099.90
  5. Step 5: Solve for x
    x = 599,797,099.90/31,259.66
  6. Step 6: Final answer
    x = 19,187.58

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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.