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Finding the Fourth Proportional to 16,938.40, 25,408.40 and 5,259.80

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Solution

The fourth proportional to 16,938.40, 25,408.40 and 5,259.80 is: 7,889.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,938.40 : 25,408.40 = 5,259.80 : x
  2. Step 2: Convert to fraction form
    16,938.40/25,408.40 = 5,259.80/x
  3. Step 3: Cross multiply
    16,938.40x = 25,408.40 × 5,259.80
  4. Step 4: Simplify right side
    16,938.40x = 133,643,102.32
  5. Step 5: Solve for x
    x = 133,643,102.32/16,938.40
  6. Step 6: Final answer
    x = 7,889.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.