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Finding the Fourth Proportional to 19,207.80, 28,817.10 and 8,119.80

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Solution

The fourth proportional to 19,207.80, 28,817.10 and 8,119.80 is: 12,181.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,207.80 : 28,817.10 = 8,119.80 : x
  2. Step 2: Convert to fraction form
    19,207.80/28,817.10 = 8,119.80/x
  3. Step 3: Cross multiply
    19,207.80x = 28,817.10 × 8,119.80
  4. Step 4: Simplify right side
    19,207.80x = 233,989,088.58
  5. Step 5: Solve for x
    x = 233,989,088.58/19,207.80
  6. Step 6: Final answer
    x = 12,181.98

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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.