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Finding the Fourth Proportional to 13,889.81, 19,167.46 and 7,923.41

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Solution

The fourth proportional to 13,889.81, 19,167.46 and 7,923.41 is: 10,934.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,889.81 : 19,167.46 = 7,923.41 : x
  2. Step 2: Convert to fraction form
    13,889.81/19,167.46 = 7,923.41/x
  3. Step 3: Cross multiply
    13,889.81x = 19,167.46 × 7,923.41
  4. Step 4: Simplify right side
    13,889.81x = 151,871,644.24
  5. Step 5: Solve for x
    x = 151,871,644.24/13,889.81
  6. Step 6: Final answer
    x = 10,934.03

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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.