Home / 9,135.77-13,705.09-3,870.80

Finding the Fourth Proportional to 9,135.77, 13,705.09 and 3,870.80

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Solution

The fourth proportional to 9,135.77, 13,705.09 and 3,870.80 is: 5,806.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,135.77 : 13,705.09 = 3,870.80 : x
  2. Step 2: Convert to fraction form
    9,135.77/13,705.09 = 3,870.80/x
  3. Step 3: Cross multiply
    9,135.77x = 13,705.09 × 3,870.80
  4. Step 4: Simplify right side
    9,135.77x = 53,049,662.37
  5. Step 5: Solve for x
    x = 53,049,662.37/9,135.77
  6. Step 6: Final answer
    x = 5,806.81

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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.