Home / 12,288.57-18,438.30-6,443.79

Finding the Fourth Proportional to 12,288.57, 18,438.30 and 6,443.79

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Solution

The fourth proportional to 12,288.57, 18,438.30 and 6,443.79 is: 9,668.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,288.57 : 18,438.30 = 6,443.79 : x
  2. Step 2: Convert to fraction form
    12,288.57/18,438.30 = 6,443.79/x
  3. Step 3: Cross multiply
    12,288.57x = 18,438.30 × 6,443.79
  4. Step 4: Simplify right side
    12,288.57x = 118,812,533.16
  5. Step 5: Solve for x
    x = 118,812,533.16/12,288.57
  6. Step 6: Final answer
    x = 9,668.54

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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.