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Finding the Fourth Proportional to 13,881.87, 19,144.87 and 9,840.71

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Solution

The fourth proportional to 13,881.87, 19,144.87 and 9,840.71 is: 13,571.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,881.87 : 19,144.87 = 9,840.71 : x
  2. Step 2: Convert to fraction form
    13,881.87/19,144.87 = 9,840.71/x
  3. Step 3: Cross multiply
    13,881.87x = 19,144.87 × 9,840.71
  4. Step 4: Simplify right side
    13,881.87x = 188,399,017.93
  5. Step 5: Solve for x
    x = 188,399,017.93/13,881.87
  6. Step 6: Final answer
    x = 13,571.59

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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.