Home / 10,665.06-15,998.40-7,778.22

Finding the Fourth Proportional to 10,665.06, 15,998.40 and 7,778.22

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Solution

The fourth proportional to 10,665.06, 15,998.40 and 7,778.22 is: 11,667.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,665.06 : 15,998.40 = 7,778.22 : x
  2. Step 2: Convert to fraction form
    10,665.06/15,998.40 = 7,778.22/x
  3. Step 3: Cross multiply
    10,665.06x = 15,998.40 × 7,778.22
  4. Step 4: Simplify right side
    10,665.06x = 124,439,074.85
  5. Step 5: Solve for x
    x = 124,439,074.85/10,665.06
  6. Step 6: Final answer
    x = 11,667.92

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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.