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Finding the Fourth Proportional to 19,592.80, 29,389.20 and 11,816.80

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Solution

The fourth proportional to 19,592.80, 29,389.20 and 11,816.80 is: 17,725.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,592.80 : 29,389.20 = 11,816.80 : x
  2. Step 2: Convert to fraction form
    19,592.80/29,389.20 = 11,816.80/x
  3. Step 3: Cross multiply
    19,592.80x = 29,389.20 × 11,816.80
  4. Step 4: Simplify right side
    19,592.80x = 347,286,298.56
  5. Step 5: Solve for x
    x = 347,286,298.56/19,592.80
  6. Step 6: Final answer
    x = 17,725.20

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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.