Home / 20,804.20-28,712.42-11,851.24

Finding the Fourth Proportional to 20,804.20, 28,712.42 and 11,851.24

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Solution

The fourth proportional to 20,804.20, 28,712.42 and 11,851.24 is: 16,356.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,804.20 : 28,712.42 = 11,851.24 : x
  2. Step 2: Convert to fraction form
    20,804.20/28,712.42 = 11,851.24/x
  3. Step 3: Cross multiply
    20,804.20x = 28,712.42 × 11,851.24
  4. Step 4: Simplify right side
    20,804.20x = 340,277,780.40
  5. Step 5: Solve for x
    x = 340,277,780.40/20,804.20
  6. Step 6: Final answer
    x = 16,356.21

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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.