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Finding the Fourth Proportional to 19,658.40, 29,436.40 and 18,736.80

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Solution

The fourth proportional to 19,658.40, 29,436.40 and 18,736.80 is: 28,056.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,658.40 : 29,436.40 = 18,736.80 : x
  2. Step 2: Convert to fraction form
    19,658.40/29,436.40 = 18,736.80/x
  3. Step 3: Cross multiply
    19,658.40x = 29,436.40 × 18,736.80
  4. Step 4: Simplify right side
    19,658.40x = 551,543,939.52
  5. Step 5: Solve for x
    x = 551,543,939.52/19,658.40
  6. Step 6: Final answer
    x = 28,056.40

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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.