Home / 20,291.58-28,007.91-11,910.78

Finding the Fourth Proportional to 20,291.58, 28,007.91 and 11,910.78

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Solution

The fourth proportional to 20,291.58, 28,007.91 and 11,910.78 is: 16,440.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,291.58 : 28,007.91 = 11,910.78 : x
  2. Step 2: Convert to fraction form
    20,291.58/28,007.91 = 11,910.78/x
  3. Step 3: Cross multiply
    20,291.58x = 28,007.91 × 11,910.78
  4. Step 4: Simplify right side
    20,291.58x = 333,596,054.27
  5. Step 5: Solve for x
    x = 333,596,054.27/20,291.58
  6. Step 6: Final answer
    x = 16,440.12

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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.