Home / 12,986.64-19,433.52-12,238.20

Finding the Fourth Proportional to 12,986.64, 19,433.52 and 12,238.20

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Solution

The fourth proportional to 12,986.64, 19,433.52 and 12,238.20 is: 18,313.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,986.64 : 19,433.52 = 12,238.20 : x
  2. Step 2: Convert to fraction form
    12,986.64/19,433.52 = 12,238.20/x
  3. Step 3: Cross multiply
    12,986.64x = 19,433.52 × 12,238.20
  4. Step 4: Simplify right side
    12,986.64x = 237,831,304.46
  5. Step 5: Solve for x
    x = 237,831,304.46/12,986.64
  6. Step 6: Final answer
    x = 18,313.54

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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.