Home / 20,809.23-28,712.25-11,854.28

Finding the Fourth Proportional to 20,809.23, 28,712.25 and 11,854.28

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Solution

The fourth proportional to 20,809.23, 28,712.25 and 11,854.28 is: 16,356.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,809.23 : 28,712.25 = 11,854.28 : x
  2. Step 2: Convert to fraction form
    20,809.23/28,712.25 = 11,854.28/x
  3. Step 3: Cross multiply
    20,809.23x = 28,712.25 × 11,854.28
  4. Step 4: Simplify right side
    20,809.23x = 340,362,907.37
  5. Step 5: Solve for x
    x = 340,362,907.37/20,809.23
  6. Step 6: Final answer
    x = 16,356.34

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Half scale
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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.