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Finding the Fourth Proportional to 17,145.60, 23,656.80 and 11,851.20

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Solution

The fourth proportional to 17,145.60, 23,656.80 and 11,851.20 is: 16,351.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,145.60 : 23,656.80 = 11,851.20 : x
  2. Step 2: Convert to fraction form
    17,145.60/23,656.80 = 11,851.20/x
  3. Step 3: Cross multiply
    17,145.60x = 23,656.80 × 11,851.20
  4. Step 4: Simplify right side
    17,145.60x = 280,361,468.16
  5. Step 5: Solve for x
    x = 280,361,468.16/17,145.60
  6. Step 6: Final answer
    x = 16,351.80

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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.