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Finding the Fourth Proportional to 6,387.64, 8,814.72 and 3,554.92

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Solution

The fourth proportional to 6,387.64, 8,814.72 and 3,554.92 is: 4,905.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,387.64 : 8,814.72 = 3,554.92 : x
  2. Step 2: Convert to fraction form
    6,387.64/8,814.72 = 3,554.92/x
  3. Step 3: Cross multiply
    6,387.64x = 8,814.72 × 3,554.92
  4. Step 4: Simplify right side
    6,387.64x = 31,335,624.42
  5. Step 5: Solve for x
    x = 31,335,624.42/6,387.64
  6. Step 6: Final answer
    x = 4,905.67

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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.