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Finding the Fourth Proportional to 8,943.18, 12,354.03 and 8,505.78

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Solution

The fourth proportional to 8,943.18, 12,354.03 and 8,505.78 is: 11,749.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,943.18 : 12,354.03 = 8,505.78 : x
  2. Step 2: Convert to fraction form
    8,943.18/12,354.03 = 8,505.78/x
  3. Step 3: Cross multiply
    8,943.18x = 12,354.03 × 8,505.78
  4. Step 4: Simplify right side
    8,943.18x = 105,080,661.29
  5. Step 5: Solve for x
    x = 105,080,661.29/8,943.18
  6. Step 6: Final answer
    x = 11,749.81

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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.