Home / 12,289.32-18,438.30-3,969.68

Finding the Fourth Proportional to 12,289.32, 18,438.30 and 3,969.68

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Solution

The fourth proportional to 12,289.32, 18,438.30 and 3,969.68 is: 5,955.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,289.32 : 18,438.30 = 3,969.68 : x
  2. Step 2: Convert to fraction form
    12,289.32/18,438.30 = 3,969.68/x
  3. Step 3: Cross multiply
    12,289.32x = 18,438.30 × 3,969.68
  4. Step 4: Simplify right side
    12,289.32x = 73,194,058.55
  5. Step 5: Solve for x
    x = 73,194,058.55/12,289.32
  6. Step 6: Final answer
    x = 5,955.91

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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.