Home / 13,840.07-19,097.97-7,871.42

Finding the Fourth Proportional to 13,840.07, 19,097.97 and 7,871.42

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Solution

The fourth proportional to 13,840.07, 19,097.97 and 7,871.42 is: 10,861.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,840.07 : 19,097.97 = 7,871.42 : x
  2. Step 2: Convert to fraction form
    13,840.07/19,097.97 = 7,871.42/x
  3. Step 3: Cross multiply
    13,840.07x = 19,097.97 × 7,871.42
  4. Step 4: Simplify right side
    13,840.07x = 150,328,143.02
  5. Step 5: Solve for x
    x = 150,328,143.02/13,840.07
  6. Step 6: Final answer
    x = 10,861.81

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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.