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Finding the Fourth Proportional to 8,705.84, 11,994.36 and 8,291.12

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Solution

The fourth proportional to 8,705.84, 11,994.36 and 8,291.12 is: 11,422.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,705.84 : 11,994.36 = 8,291.12 : x
  2. Step 2: Convert to fraction form
    8,705.84/11,994.36 = 8,291.12/x
  3. Step 3: Cross multiply
    8,705.84x = 11,994.36 × 8,291.12
  4. Step 4: Simplify right side
    8,705.84x = 99,446,678.08
  5. Step 5: Solve for x
    x = 99,446,678.08/8,705.84
  6. Step 6: Final answer
    x = 11,422.98

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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.