Home / 20,578.76-28,388.34-13,504.20

Finding the Fourth Proportional to 20,578.76, 28,388.34 and 13,504.20

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Solution

The fourth proportional to 20,578.76, 28,388.34 and 13,504.20 is: 18,629.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,578.76 : 28,388.34 = 13,504.20 : x
  2. Step 2: Convert to fraction form
    20,578.76/28,388.34 = 13,504.20/x
  3. Step 3: Cross multiply
    20,578.76x = 28,388.34 × 13,504.20
  4. Step 4: Simplify right side
    20,578.76x = 383,361,821.03
  5. Step 5: Solve for x
    x = 383,361,821.03/20,578.76
  6. Step 6: Final answer
    x = 18,629.00

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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.