Home / 31,331.47-46,906.95-20,812

Finding the Fourth Proportional to 31,331.47, 46,906.95 and 20,812

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Solution

The fourth proportional to 31,331.47, 46,906.95 and 20,812 is: 31,158.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,331.47 : 46,906.95 = 20,812 : x
  2. Step 2: Convert to fraction form
    31,331.47/46,906.95 = 20,812/x
  3. Step 3: Cross multiply
    31,331.47x = 46,906.95 × 20,812
  4. Step 4: Simplify right side
    31,331.47x = 976,227,443.40
  5. Step 5: Solve for x
    x = 976,227,443.40/31,331.47
  6. Step 6: Final answer
    x = 31,158.05

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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.