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Finding the Fourth Proportional to 19,629.60, 29,401.20 and 17,440.80

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Solution

The fourth proportional to 19,629.60, 29,401.20 and 17,440.80 is: 26,122.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,629.60 : 29,401.20 = 17,440.80 : x
  2. Step 2: Convert to fraction form
    19,629.60/29,401.20 = 17,440.80/x
  3. Step 3: Cross multiply
    19,629.60x = 29,401.20 × 17,440.80
  4. Step 4: Simplify right side
    19,629.60x = 512,780,448.96
  5. Step 5: Solve for x
    x = 512,780,448.96/19,629.60
  6. Step 6: Final answer
    x = 26,122.82

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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.