Home / 20,645.86-28,493.67-19,379.15

Finding the Fourth Proportional to 20,645.86, 28,493.67 and 19,379.15

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Solution

The fourth proportional to 20,645.86, 28,493.67 and 19,379.15 is: 26,745.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,645.86 : 28,493.67 = 19,379.15 : x
  2. Step 2: Convert to fraction form
    20,645.86/28,493.67 = 19,379.15/x
  3. Step 3: Cross multiply
    20,645.86x = 28,493.67 × 19,379.15
  4. Step 4: Simplify right side
    20,645.86x = 552,183,248.89
  5. Step 5: Solve for x
    x = 552,183,248.89/20,645.86
  6. Step 6: Final answer
    x = 26,745.47

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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.