Home / 20,740.85-28,625.15-13,187.93

Finding the Fourth Proportional to 20,740.85, 28,625.15 and 13,187.93

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Solution

The fourth proportional to 20,740.85, 28,625.15 and 13,187.93 is: 18,201.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,740.85 : 28,625.15 = 13,187.93 : x
  2. Step 2: Convert to fraction form
    20,740.85/28,625.15 = 13,187.93/x
  3. Step 3: Cross multiply
    20,740.85x = 28,625.15 × 13,187.93
  4. Step 4: Simplify right side
    20,740.85x = 377,506,474.44
  5. Step 5: Solve for x
    x = 377,506,474.44/20,740.85
  6. Step 6: Final answer
    x = 18,201.11

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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.