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Finding the Fourth Proportional to 19,489.60, 29,234.40 and 19,316.80

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Solution

The fourth proportional to 19,489.60, 29,234.40 and 19,316.80 is: 28,975.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,489.60 : 29,234.40 = 19,316.80 : x
  2. Step 2: Convert to fraction form
    19,489.60/29,234.40 = 19,316.80/x
  3. Step 3: Cross multiply
    19,489.60x = 29,234.40 × 19,316.80
  4. Step 4: Simplify right side
    19,489.60x = 564,715,057.92
  5. Step 5: Solve for x
    x = 564,715,057.92/19,489.60
  6. Step 6: Final answer
    x = 28,975.20

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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.