Home / 13,840.67-19,100.21-7,871.99

Finding the Fourth Proportional to 13,840.67, 19,100.21 and 7,871.99

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Solution

The fourth proportional to 13,840.67, 19,100.21 and 7,871.99 is: 10,863.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,840.67 : 19,100.21 = 7,871.99 : x
  2. Step 2: Convert to fraction form
    13,840.67/19,100.21 = 7,871.99/x
  3. Step 3: Cross multiply
    13,840.67x = 19,100.21 × 7,871.99
  4. Step 4: Simplify right side
    13,840.67x = 150,356,527.26
  5. Step 5: Solve for x
    x = 150,356,527.26/13,840.67
  6. Step 6: Final answer
    x = 10,863.38

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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.