Home / 31,845.78-43,967.07-20,520.90

Finding the Fourth Proportional to 31,845.78, 43,967.07 and 20,520.90

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Solution

The fourth proportional to 31,845.78, 43,967.07 and 20,520.90 is: 28,331.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,845.78 : 43,967.07 = 20,520.90 : x
  2. Step 2: Convert to fraction form
    31,845.78/43,967.07 = 20,520.90/x
  3. Step 3: Cross multiply
    31,845.78x = 43,967.07 × 20,520.90
  4. Step 4: Simplify right side
    31,845.78x = 902,243,846.76
  5. Step 5: Solve for x
    x = 902,243,846.76/31,845.78
  6. Step 6: Final answer
    x = 28,331.66

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1.5x scale

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.