Home / 12,632.36-18,939.42-7,890.21

Finding the Fourth Proportional to 12,632.36, 18,939.42 and 7,890.21

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Solution

The fourth proportional to 12,632.36, 18,939.42 and 7,890.21 is: 11,829.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,632.36 : 18,939.42 = 7,890.21 : x
  2. Step 2: Convert to fraction form
    12,632.36/18,939.42 = 7,890.21/x
  3. Step 3: Cross multiply
    12,632.36x = 18,939.42 × 7,890.21
  4. Step 4: Simplify right side
    12,632.36x = 149,436,001.08
  5. Step 5: Solve for x
    x = 149,436,001.08/12,632.36
  6. Step 6: Final answer
    x = 11,829.62

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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.