Home / 7,788.35-11,686.48-3,405.85

Finding the Fourth Proportional to 7,788.35, 11,686.48 and 3,405.85

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Solution

The fourth proportional to 7,788.35, 11,686.48 and 3,405.85 is: 5,110.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,788.35 : 11,686.48 = 3,405.85 : x
  2. Step 2: Convert to fraction form
    7,788.35/11,686.48 = 3,405.85/x
  3. Step 3: Cross multiply
    7,788.35x = 11,686.48 × 3,405.85
  4. Step 4: Simplify right side
    7,788.35x = 39,802,360.18
  5. Step 5: Solve for x
    x = 39,802,360.18/7,788.35
  6. Step 6: Final answer
    x = 5,110.50

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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.