Home / 12,912.56-19,344.40-7,631.76

Finding the Fourth Proportional to 12,912.56, 19,344.40 and 7,631.76

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Solution

The fourth proportional to 12,912.56, 19,344.40 and 7,631.76 is: 11,433.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,912.56 : 19,344.40 = 7,631.76 : x
  2. Step 2: Convert to fraction form
    12,912.56/19,344.40 = 7,631.76/x
  3. Step 3: Cross multiply
    12,912.56x = 19,344.40 × 7,631.76
  4. Step 4: Simplify right side
    12,912.56x = 147,631,818.14
  5. Step 5: Solve for x
    x = 147,631,818.14/12,912.56
  6. Step 6: Final answer
    x = 11,433.20

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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.