Home / 12,386.40-18,601.20-11,997.60

Finding the Fourth Proportional to 12,386.40, 18,601.20 and 11,997.60

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Solution

The fourth proportional to 12,386.40, 18,601.20 and 11,997.60 is: 18,017.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,386.40 : 18,601.20 = 11,997.60 : x
  2. Step 2: Convert to fraction form
    12,386.40/18,601.20 = 11,997.60/x
  3. Step 3: Cross multiply
    12,386.40x = 18,601.20 × 11,997.60
  4. Step 4: Simplify right side
    12,386.40x = 223,169,757.12
  5. Step 5: Solve for x
    x = 223,169,757.12/12,386.40
  6. Step 6: Final answer
    x = 18,017.32

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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.