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Finding the Fourth Proportional to 8,691.36, 11,994.09 and 4,712.45

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Solution

The fourth proportional to 8,691.36, 11,994.09 and 4,712.45 is: 6,503.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,691.36 : 11,994.09 = 4,712.45 : x
  2. Step 2: Convert to fraction form
    8,691.36/11,994.09 = 4,712.45/x
  3. Step 3: Cross multiply
    8,691.36x = 11,994.09 × 4,712.45
  4. Step 4: Simplify right side
    8,691.36x = 56,521,565.75
  5. Step 5: Solve for x
    x = 56,521,565.75/8,691.36
  6. Step 6: Final answer
    x = 6,503.19

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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.