Home / 13,788.87-20,686.54-3,928.29

Finding the Fourth Proportional to 13,788.87, 20,686.54 and 3,928.29

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Solution

The fourth proportional to 13,788.87, 20,686.54 and 3,928.29 is: 5,893.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,788.87 : 20,686.54 = 3,928.29 : x
  2. Step 2: Convert to fraction form
    13,788.87/20,686.54 = 3,928.29/x
  3. Step 3: Cross multiply
    13,788.87x = 20,686.54 × 3,928.29
  4. Step 4: Simplify right side
    13,788.87x = 81,262,728.22
  5. Step 5: Solve for x
    x = 81,262,728.22/13,788.87
  6. Step 6: Final answer
    x = 5,893.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.