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Finding the Fourth Proportional to 8,673.84, 11,913.93 and 8,507.79

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Solution

The fourth proportional to 8,673.84, 11,913.93 and 8,507.79 is: 11,685.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,673.84 : 11,913.93 = 8,507.79 : x
  2. Step 2: Convert to fraction form
    8,673.84/11,913.93 = 8,507.79/x
  3. Step 3: Cross multiply
    8,673.84x = 11,913.93 × 8,507.79
  4. Step 4: Simplify right side
    8,673.84x = 101,361,214.51
  5. Step 5: Solve for x
    x = 101,361,214.51/8,673.84
  6. Step 6: Final answer
    x = 11,685.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.