Home / 13,788.83-20,683.20-3,928.16

Finding the Fourth Proportional to 13,788.83, 20,683.20 and 3,928.16

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Solution

The fourth proportional to 13,788.83, 20,683.20 and 3,928.16 is: 5,892.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,788.83 : 20,683.20 = 3,928.16 : x
  2. Step 2: Convert to fraction form
    13,788.83/20,683.20 = 3,928.16/x
  3. Step 3: Cross multiply
    13,788.83x = 20,683.20 × 3,928.16
  4. Step 4: Simplify right side
    13,788.83x = 81,246,918.91
  5. Step 5: Solve for x
    x = 81,246,918.91/13,788.83
  6. Step 6: Final answer
    x = 5,892.23

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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.