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Finding the Fourth Proportional to 7,808.09, 10,779.62 and 5,163.17

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Solution

The fourth proportional to 7,808.09, 10,779.62 and 5,163.17 is: 7,128.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,808.09 : 10,779.62 = 5,163.17 : x
  2. Step 2: Convert to fraction form
    7,808.09/10,779.62 = 5,163.17/x
  3. Step 3: Cross multiply
    7,808.09x = 10,779.62 × 5,163.17
  4. Step 4: Simplify right side
    7,808.09x = 55,657,010.60
  5. Step 5: Solve for x
    x = 55,657,010.60/7,808.09
  6. Step 6: Final answer
    x = 7,128.12

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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.