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Finding the Fourth Proportional to 17,138.79, 25,715.48 and 10,905.84

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Solution

The fourth proportional to 17,138.79, 25,715.48 and 10,905.84 is: 16,363.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,138.79 : 25,715.48 = 10,905.84 : x
  2. Step 2: Convert to fraction form
    17,138.79/25,715.48 = 10,905.84/x
  3. Step 3: Cross multiply
    17,138.79x = 25,715.48 × 10,905.84
  4. Step 4: Simplify right side
    17,138.79x = 280,448,855.87
  5. Step 5: Solve for x
    x = 280,448,855.87/17,138.79
  6. Step 6: Final answer
    x = 16,363.40

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1.5x scale

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.