Home / 20,556.86-28,338.80-13,470.98

Finding the Fourth Proportional to 20,556.86, 28,338.80 and 13,470.98

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Solution

The fourth proportional to 20,556.86, 28,338.80 and 13,470.98 is: 18,570.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,556.86 : 28,338.80 = 13,470.98 : x
  2. Step 2: Convert to fraction form
    20,556.86/28,338.80 = 13,470.98/x
  3. Step 3: Cross multiply
    20,556.86x = 28,338.80 × 13,470.98
  4. Step 4: Simplify right side
    20,556.86x = 381,751,198.98
  5. Step 5: Solve for x
    x = 381,751,198.98/20,556.86
  6. Step 6: Final answer
    x = 18,570.51

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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.