Home / 31,736.05-43,775.85-20,420.26

Finding the Fourth Proportional to 31,736.05, 43,775.85 and 20,420.26

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Solution

The fourth proportional to 31,736.05, 43,775.85 and 20,420.26 is: 28,167.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,736.05 : 43,775.85 = 20,420.26 : x
  2. Step 2: Convert to fraction form
    31,736.05/43,775.85 = 20,420.26/x
  3. Step 3: Cross multiply
    31,736.05x = 43,775.85 × 20,420.26
  4. Step 4: Simplify right side
    31,736.05x = 893,914,238.72
  5. Step 5: Solve for x
    x = 893,914,238.72/31,736.05
  6. Step 6: Final answer
    x = 28,167.15

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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.