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Finding the Fourth Proportional to 6,312.72, 8,711.56 and 3,660.64

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Solution

The fourth proportional to 6,312.72, 8,711.56 and 3,660.64 is: 5,051.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,312.72 : 8,711.56 = 3,660.64 : x
  2. Step 2: Convert to fraction form
    6,312.72/8,711.56 = 3,660.64/x
  3. Step 3: Cross multiply
    6,312.72x = 8,711.56 × 3,660.64
  4. Step 4: Simplify right side
    6,312.72x = 31,889,885.00
  5. Step 5: Solve for x
    x = 31,889,885.00/6,312.72
  6. Step 6: Final answer
    x = 5,051.69

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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.