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Finding the Fourth Proportional to 8,805.24, 12,156.48 and 7,821.09

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Solution

The fourth proportional to 8,805.24, 12,156.48 and 7,821.09 is: 10,797.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,805.24 : 12,156.48 = 7,821.09 : x
  2. Step 2: Convert to fraction form
    8,805.24/12,156.48 = 7,821.09/x
  3. Step 3: Cross multiply
    8,805.24x = 12,156.48 × 7,821.09
  4. Step 4: Simplify right side
    8,805.24x = 95,076,924.16
  5. Step 5: Solve for x
    x = 95,076,924.16/8,805.24
  6. Step 6: Final answer
    x = 10,797.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.