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Finding the Fourth Proportional to 9,153.51, 12,689.61 and 8,654.60

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Solution

The fourth proportional to 9,153.51, 12,689.61 and 8,654.60 is: 11,997.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,153.51 : 12,689.61 = 8,654.60 : x
  2. Step 2: Convert to fraction form
    9,153.51/12,689.61 = 8,654.60/x
  3. Step 3: Cross multiply
    9,153.51x = 12,689.61 × 8,654.60
  4. Step 4: Simplify right side
    9,153.51x = 109,823,475.28
  5. Step 5: Solve for x
    x = 109,823,475.28/9,153.51
  6. Step 6: Final answer
    x = 11,997.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.