Home / 12,016.40-18,013.80-7,631.60

Finding the Fourth Proportional to 12,016.40, 18,013.80 and 7,631.60

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Solution

The fourth proportional to 12,016.40, 18,013.80 and 7,631.60 is: 11,440.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,016.40 : 18,013.80 = 7,631.60 : x
  2. Step 2: Convert to fraction form
    12,016.40/18,013.80 = 7,631.60/x
  3. Step 3: Cross multiply
    12,016.40x = 18,013.80 × 7,631.60
  4. Step 4: Simplify right side
    12,016.40x = 137,474,116.08
  5. Step 5: Solve for x
    x = 137,474,116.08/12,016.40
  6. Step 6: Final answer
    x = 11,440.54

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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.