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Finding the Fourth Proportional to 8,482.40, 11,705.74 and 4,705.64

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Solution

The fourth proportional to 8,482.40, 11,705.74 and 4,705.64 is: 6,493.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,482.40 : 11,705.74 = 4,705.64 : x
  2. Step 2: Convert to fraction form
    8,482.40/11,705.74 = 4,705.64/x
  3. Step 3: Cross multiply
    8,482.40x = 11,705.74 × 4,705.64
  4. Step 4: Simplify right side
    8,482.40x = 55,082,932.44
  5. Step 5: Solve for x
    x = 55,082,932.44/8,482.40
  6. Step 6: Final answer
    x = 6,493.79

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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.