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Finding the Fourth Proportional to 7,853.76, 11,754.72 and 6,989.76

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Solution

The fourth proportional to 7,853.76, 11,754.72 and 6,989.76 is: 10,461.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,853.76 : 11,754.72 = 6,989.76 : x
  2. Step 2: Convert to fraction form
    7,853.76/11,754.72 = 6,989.76/x
  3. Step 3: Cross multiply
    7,853.76x = 11,754.72 × 6,989.76
  4. Step 4: Simplify right side
    7,853.76x = 82,162,671.67
  5. Step 5: Solve for x
    x = 82,162,671.67/7,853.76
  6. Step 6: Final answer
    x = 10,461.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.