Home / 12,912.40-19,319.72-7,650.24

Finding the Fourth Proportional to 12,912.40, 19,319.72 and 7,650.24

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Solution

The fourth proportional to 12,912.40, 19,319.72 and 7,650.24 is: 11,446.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,912.40 : 19,319.72 = 7,650.24 : x
  2. Step 2: Convert to fraction form
    12,912.40/19,319.72 = 7,650.24/x
  3. Step 3: Cross multiply
    12,912.40x = 19,319.72 × 7,650.24
  4. Step 4: Simplify right side
    12,912.40x = 147,800,494.73
  5. Step 5: Solve for x
    x = 147,800,494.73/12,912.40
  6. Step 6: Final answer
    x = 11,446.40

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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.