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Finding the Fourth Proportional to 19,007.81, 28,516.58 and 7,910.81

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Solution

The fourth proportional to 19,007.81, 28,516.58 and 7,910.81 is: 11,868.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,007.81 : 28,516.58 = 7,910.81 : x
  2. Step 2: Convert to fraction form
    19,007.81/28,516.58 = 7,910.81/x
  3. Step 3: Cross multiply
    19,007.81x = 28,516.58 × 7,910.81
  4. Step 4: Simplify right side
    19,007.81x = 225,589,206.68
  5. Step 5: Solve for x
    x = 225,589,206.68/19,007.81
  6. Step 6: Final answer
    x = 11,868.24

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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.