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Finding the Fourth Proportional to 7,805.55, 10,771.09 and 4,821.45

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Solution

The fourth proportional to 7,805.55, 10,771.09 and 4,821.45 is: 6,653.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,805.55 : 10,771.09 = 4,821.45 : x
  2. Step 2: Convert to fraction form
    7,805.55/10,771.09 = 4,821.45/x
  3. Step 3: Cross multiply
    7,805.55x = 10,771.09 × 4,821.45
  4. Step 4: Simplify right side
    7,805.55x = 51,932,271.88
  5. Step 5: Solve for x
    x = 51,932,271.88/7,805.55
  6. Step 6: Final answer
    x = 6,653.25

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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.