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Finding the Fourth Proportional to 7,841.72, 10,821.54 and 4,305

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Solution

The fourth proportional to 7,841.72, 10,821.54 and 4,305 is: 5,940.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,841.72 : 10,821.54 = 4,305 : x
  2. Step 2: Convert to fraction form
    7,841.72/10,821.54 = 4,305/x
  3. Step 3: Cross multiply
    7,841.72x = 10,821.54 × 4,305
  4. Step 4: Simplify right side
    7,841.72x = 46,586,729.70
  5. Step 5: Solve for x
    x = 46,586,729.70/7,841.72
  6. Step 6: Final answer
    x = 5,940.88

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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.