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Finding the Fourth Proportional to 7,728.84, 11,500.29 and 7,702.92

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Solution

The fourth proportional to 7,728.84, 11,500.29 and 7,702.92 is: 11,461.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,728.84 : 11,500.29 = 7,702.92 : x
  2. Step 2: Convert to fraction form
    7,728.84/11,500.29 = 7,702.92/x
  3. Step 3: Cross multiply
    7,728.84x = 11,500.29 × 7,702.92
  4. Step 4: Simplify right side
    7,728.84x = 88,585,813.85
  5. Step 5: Solve for x
    x = 88,585,813.85/7,728.84
  6. Step 6: Final answer
    x = 11,461.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.