Home / 31,618.89-43,638.44-18,189.90

Finding the Fourth Proportional to 31,618.89, 43,638.44 and 18,189.90

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Solution

The fourth proportional to 31,618.89, 43,638.44 and 18,189.90 is: 25,104.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,618.89 : 43,638.44 = 18,189.90 : x
  2. Step 2: Convert to fraction form
    31,618.89/43,638.44 = 18,189.90/x
  3. Step 3: Cross multiply
    31,618.89x = 43,638.44 × 18,189.90
  4. Step 4: Simplify right side
    31,618.89x = 793,778,859.76
  5. Step 5: Solve for x
    x = 793,778,859.76/31,618.89
  6. Step 6: Final answer
    x = 25,104.58

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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.