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Finding the Fourth Proportional to 10,783.40, 16,175.10 and 8,191.40

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Solution

The fourth proportional to 10,783.40, 16,175.10 and 8,191.40 is: 12,287.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,783.40 : 16,175.10 = 8,191.40 : x
  2. Step 2: Convert to fraction form
    10,783.40/16,175.10 = 8,191.40/x
  3. Step 3: Cross multiply
    10,783.40x = 16,175.10 × 8,191.40
  4. Step 4: Simplify right side
    10,783.40x = 132,496,714.14
  5. Step 5: Solve for x
    x = 132,496,714.14/10,783.40
  6. Step 6: Final answer
    x = 12,287.10

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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.