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Finding the Fourth Proportional to 13,980.75, 19,293.44 and 8,391.75

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Solution

The fourth proportional to 13,980.75, 19,293.44 and 8,391.75 is: 11,580.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,980.75 : 19,293.44 = 8,391.75 : x
  2. Step 2: Convert to fraction form
    13,980.75/19,293.44 = 8,391.75/x
  3. Step 3: Cross multiply
    13,980.75x = 19,293.44 × 8,391.75
  4. Step 4: Simplify right side
    13,980.75x = 161,905,683.16
  5. Step 5: Solve for x
    x = 161,905,683.16/13,980.75
  6. Step 6: Final answer
    x = 11,580.62

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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.