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Finding the Fourth Proportional to 17,128.80, 25,660.80 and 15,962.40

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Solution

The fourth proportional to 17,128.80, 25,660.80 and 15,962.40 is: 23,913.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,128.80 : 25,660.80 = 15,962.40 : x
  2. Step 2: Convert to fraction form
    17,128.80/25,660.80 = 15,962.40/x
  3. Step 3: Cross multiply
    17,128.80x = 25,660.80 × 15,962.40
  4. Step 4: Simplify right side
    17,128.80x = 409,607,953.92
  5. Step 5: Solve for x
    x = 409,607,953.92/17,128.80
  6. Step 6: Final answer
    x = 23,913.41

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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.