Home / 31,181.22-42,997.34-20,557.26

Finding the Fourth Proportional to 31,181.22, 42,997.34 and 20,557.26

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Solution

The fourth proportional to 31,181.22, 42,997.34 and 20,557.26 is: 28,347.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,181.22 : 42,997.34 = 20,557.26 : x
  2. Step 2: Convert to fraction form
    31,181.22/42,997.34 = 20,557.26/x
  3. Step 3: Cross multiply
    31,181.22x = 42,997.34 × 20,557.26
  4. Step 4: Simplify right side
    31,181.22x = 883,907,497.69
  5. Step 5: Solve for x
    x = 883,907,497.69/31,181.22
  6. Step 6: Final answer
    x = 28,347.43

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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.