Home / 12,790.19-19,206.13-7,890.97

Finding the Fourth Proportional to 12,790.19, 19,206.13 and 7,890.97

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Solution

The fourth proportional to 12,790.19, 19,206.13 and 7,890.97 is: 11,849.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,790.19 : 19,206.13 = 7,890.97 : x
  2. Step 2: Convert to fraction form
    12,790.19/19,206.13 = 7,890.97/x
  3. Step 3: Cross multiply
    12,790.19x = 19,206.13 × 7,890.97
  4. Step 4: Simplify right side
    12,790.19x = 151,554,995.36
  5. Step 5: Solve for x
    x = 151,554,995.36/12,790.19
  6. Step 6: Final answer
    x = 11,849.31

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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.