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Finding the Fourth Proportional to 19,336.80, 29,005.20 and 18,429.60

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Solution

The fourth proportional to 19,336.80, 29,005.20 and 18,429.60 is: 27,644.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,336.80 : 29,005.20 = 18,429.60 : x
  2. Step 2: Convert to fraction form
    19,336.80/29,005.20 = 18,429.60/x
  3. Step 3: Cross multiply
    19,336.80x = 29,005.20 × 18,429.60
  4. Step 4: Simplify right side
    19,336.80x = 534,554,233.92
  5. Step 5: Solve for x
    x = 534,554,233.92/19,336.80
  6. Step 6: Final answer
    x = 27,644.40

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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.