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Finding the Fourth Proportional to 19,007.16, 28,491.60 and 7,919.98

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Solution

The fourth proportional to 19,007.16, 28,491.60 and 7,919.98 is: 11,871.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,007.16 : 28,491.60 = 7,919.98 : x
  2. Step 2: Convert to fraction form
    19,007.16/28,491.60 = 7,919.98/x
  3. Step 3: Cross multiply
    19,007.16x = 28,491.60 × 7,919.98
  4. Step 4: Simplify right side
    19,007.16x = 225,652,816.09
  5. Step 5: Solve for x
    x = 225,652,816.09/19,007.16
  6. Step 6: Final answer
    x = 11,871.99

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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.