Home / 8,428.37-12,622.84-6,661.51

Finding the Fourth Proportional to 8,428.37, 12,622.84 and 6,661.51

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Solution

The fourth proportional to 8,428.37, 12,622.84 and 6,661.51 is: 9,976.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,428.37 : 12,622.84 = 6,661.51 : x
  2. Step 2: Convert to fraction form
    8,428.37/12,622.84 = 6,661.51/x
  3. Step 3: Cross multiply
    8,428.37x = 12,622.84 × 6,661.51
  4. Step 4: Simplify right side
    8,428.37x = 84,087,174.89
  5. Step 5: Solve for x
    x = 84,087,174.89/8,428.37
  6. Step 6: Final answer
    x = 9,976.68

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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.