Home / 8,288.80-12,428.64-4,120.24

Finding the Fourth Proportional to 8,288.80, 12,428.64 and 4,120.24

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Solution

The fourth proportional to 8,288.80, 12,428.64 and 4,120.24 is: 6,178.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,288.80 : 12,428.64 = 4,120.24 : x
  2. Step 2: Convert to fraction form
    8,288.80/12,428.64 = 4,120.24/x
  3. Step 3: Cross multiply
    8,288.80x = 12,428.64 × 4,120.24
  4. Step 4: Simplify right side
    8,288.80x = 51,208,979.67
  5. Step 5: Solve for x
    x = 51,208,979.67/8,288.80
  6. Step 6: Final answer
    x = 6,178.09

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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.