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Finding the Fourth Proportional to 11,447.85, 15,797.90 and 6,412.11

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Solution

The fourth proportional to 11,447.85, 15,797.90 and 6,412.11 is: 8,848.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,447.85 : 15,797.90 = 6,412.11 : x
  2. Step 2: Convert to fraction form
    11,447.85/15,797.90 = 6,412.11/x
  3. Step 3: Cross multiply
    11,447.85x = 15,797.90 × 6,412.11
  4. Step 4: Simplify right side
    11,447.85x = 101,297,840.51
  5. Step 5: Solve for x
    x = 101,297,840.51/11,447.85
  6. Step 6: Final answer
    x = 8,848.63

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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.