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Finding the Fourth Proportional to 12,779.66, 17,639.01 and 7,474.97

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Solution

The fourth proportional to 12,779.66, 17,639.01 and 7,474.97 is: 10,317.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,779.66 : 17,639.01 = 7,474.97 : x
  2. Step 2: Convert to fraction form
    12,779.66/17,639.01 = 7,474.97/x
  3. Step 3: Cross multiply
    12,779.66x = 17,639.01 × 7,474.97
  4. Step 4: Simplify right side
    12,779.66x = 131,850,982.38
  5. Step 5: Solve for x
    x = 131,850,982.38/12,779.66
  6. Step 6: Final answer
    x = 10,317.26

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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.