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Finding the Fourth Proportional to 25,321.99, 34,945.99 and 13,991.48

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Solution

The fourth proportional to 25,321.99, 34,945.99 and 13,991.48 is: 19,309.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,321.99 : 34,945.99 = 13,991.48 : x
  2. Step 2: Convert to fraction form
    25,321.99/34,945.99 = 13,991.48/x
  3. Step 3: Cross multiply
    25,321.99x = 34,945.99 × 13,991.48
  4. Step 4: Simplify right side
    25,321.99x = 488,946,120.17
  5. Step 5: Solve for x
    x = 488,946,120.17/25,321.99
  6. Step 6: Final answer
    x = 19,309.15

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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.