Home / 12,890.23-19,338.98-7,629.88

Finding the Fourth Proportional to 12,890.23, 19,338.98 and 7,629.88

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Solution

The fourth proportional to 12,890.23, 19,338.98 and 7,629.88 is: 11,446.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,890.23 : 19,338.98 = 7,629.88 : x
  2. Step 2: Convert to fraction form
    12,890.23/19,338.98 = 7,629.88/x
  3. Step 3: Cross multiply
    12,890.23x = 19,338.98 × 7,629.88
  4. Step 4: Simplify right side
    12,890.23x = 147,554,096.72
  5. Step 5: Solve for x
    x = 147,554,096.72/12,890.23
  6. Step 6: Final answer
    x = 11,446.97

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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.