Home / 20,385.85-28,132.52-11,893.81

Finding the Fourth Proportional to 20,385.85, 28,132.52 and 11,893.81

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Solution

The fourth proportional to 20,385.85, 28,132.52 and 11,893.81 is: 16,413.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,385.85 : 28,132.52 = 11,893.81 : x
  2. Step 2: Convert to fraction form
    20,385.85/28,132.52 = 11,893.81/x
  3. Step 3: Cross multiply
    20,385.85x = 28,132.52 × 11,893.81
  4. Step 4: Simplify right side
    20,385.85x = 334,602,847.70
  5. Step 5: Solve for x
    x = 334,602,847.70/20,385.85
  6. Step 6: Final answer
    x = 16,413.49

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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.