Home / 8,986.54-12,399.78-6,828.70

Finding the Fourth Proportional to 8,986.54, 12,399.78 and 6,828.70

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Solution

The fourth proportional to 8,986.54, 12,399.78 and 6,828.70 is: 9,422.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,986.54 : 12,399.78 = 6,828.70 : x
  2. Step 2: Convert to fraction form
    8,986.54/12,399.78 = 6,828.70/x
  3. Step 3: Cross multiply
    8,986.54x = 12,399.78 × 6,828.70
  4. Step 4: Simplify right side
    8,986.54x = 84,674,377.69
  5. Step 5: Solve for x
    x = 84,674,377.69/8,986.54
  6. Step 6: Final answer
    x = 9,422.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.