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Finding the Fourth Proportional to 29,169, 40,253.22 and 15,921

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Solution

The fourth proportional to 29,169, 40,253.22 and 15,921 is: 21,970.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,169 : 40,253.22 = 15,921 : x
  2. Step 2: Convert to fraction form
    29,169/40,253.22 = 15,921/x
  3. Step 3: Cross multiply
    29,169x = 40,253.22 × 15,921
  4. Step 4: Simplify right side
    29,169x = 640,871,515.62
  5. Step 5: Solve for x
    x = 640,871,515.62/29,169
  6. Step 6: Final answer
    x = 21,970.98

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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.