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Finding the Fourth Proportional to 13,919.10, 20,880.80 and 4,684.38

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Solution

The fourth proportional to 13,919.10, 20,880.80 and 4,684.38 is: 7,027.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,919.10 : 20,880.80 = 4,684.38 : x
  2. Step 2: Convert to fraction form
    13,919.10/20,880.80 = 4,684.38/x
  3. Step 3: Cross multiply
    13,919.10x = 20,880.80 × 4,684.38
  4. Step 4: Simplify right side
    13,919.10x = 97,813,601.90
  5. Step 5: Solve for x
    x = 97,813,601.90/13,919.10
  6. Step 6: Final answer
    x = 7,027.29

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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.