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Finding the Fourth Proportional to 7,811.82, 10,780.10 and 4,274.81

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Solution

The fourth proportional to 7,811.82, 10,780.10 and 4,274.81 is: 5,899.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,811.82 : 10,780.10 = 4,274.81 : x
  2. Step 2: Convert to fraction form
    7,811.82/10,780.10 = 4,274.81/x
  3. Step 3: Cross multiply
    7,811.82x = 10,780.10 × 4,274.81
  4. Step 4: Simplify right side
    7,811.82x = 46,082,804.01
  5. Step 5: Solve for x
    x = 46,082,804.01/7,811.82
  6. Step 6: Final answer
    x = 5,899.11

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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.