Home / 7,785.36-11,681.40-4,086.69

Finding the Fourth Proportional to 7,785.36, 11,681.40 and 4,086.69

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Solution

The fourth proportional to 7,785.36, 11,681.40 and 4,086.69 is: 6,131.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,785.36 : 11,681.40 = 4,086.69 : x
  2. Step 2: Convert to fraction form
    7,785.36/11,681.40 = 4,086.69/x
  3. Step 3: Cross multiply
    7,785.36x = 11,681.40 × 4,086.69
  4. Step 4: Simplify right side
    7,785.36x = 47,738,260.57
  5. Step 5: Solve for x
    x = 47,738,260.57/7,785.36
  6. Step 6: Final answer
    x = 6,131.80

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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.