Home / 31,664.79-43,700.40-18,918

Finding the Fourth Proportional to 31,664.79, 43,700.40 and 18,918

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Solution

The fourth proportional to 31,664.79, 43,700.40 and 18,918 is: 26,108.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,664.79 : 43,700.40 = 18,918 : x
  2. Step 2: Convert to fraction form
    31,664.79/43,700.40 = 18,918/x
  3. Step 3: Cross multiply
    31,664.79x = 43,700.40 × 18,918
  4. Step 4: Simplify right side
    31,664.79x = 826,724,167.20
  5. Step 5: Solve for x
    x = 826,724,167.20/31,664.79
  6. Step 6: Final answer
    x = 26,108.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.