Home / 7,817.12-11,725.68-3,929.12

Finding the Fourth Proportional to 7,817.12, 11,725.68 and 3,929.12

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Solution

The fourth proportional to 7,817.12, 11,725.68 and 3,929.12 is: 5,893.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,817.12 : 11,725.68 = 3,929.12 : x
  2. Step 2: Convert to fraction form
    7,817.12/11,725.68 = 3,929.12/x
  3. Step 3: Cross multiply
    7,817.12x = 11,725.68 × 3,929.12
  4. Step 4: Simplify right side
    7,817.12x = 46,071,603.80
  5. Step 5: Solve for x
    x = 46,071,603.80/7,817.12
  6. Step 6: Final answer
    x = 5,893.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.