Home / 28,749.15-39,672.05-16,811.78

Finding the Fourth Proportional to 28,749.15, 39,672.05 and 16,811.78

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Solution

The fourth proportional to 28,749.15, 39,672.05 and 16,811.78 is: 23,199.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,749.15 : 39,672.05 = 16,811.78 : x
  2. Step 2: Convert to fraction form
    28,749.15/39,672.05 = 16,811.78/x
  3. Step 3: Cross multiply
    28,749.15x = 39,672.05 × 16,811.78
  4. Step 4: Simplify right side
    28,749.15x = 666,957,494.33
  5. Step 5: Solve for x
    x = 666,957,494.33/28,749.15
  6. Step 6: Final answer
    x = 23,199.21

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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.