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Finding the Fourth Proportional to 17,364.78, 23,911.20 and 15,697.80

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Solution

The fourth proportional to 17,364.78, 23,911.20 and 15,697.80 is: 21,615.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,364.78 : 23,911.20 = 15,697.80 : x
  2. Step 2: Convert to fraction form
    17,364.78/23,911.20 = 15,697.80/x
  3. Step 3: Cross multiply
    17,364.78x = 23,911.20 × 15,697.80
  4. Step 4: Simplify right side
    17,364.78x = 375,353,235.36
  5. Step 5: Solve for x
    x = 375,353,235.36/17,364.78
  6. Step 6: Final answer
    x = 21,615.78

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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.