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Finding the Fourth Proportional to 19,158.94, 28,749.89 and 8,064.91

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Solution

The fourth proportional to 19,158.94, 28,749.89 and 8,064.91 is: 12,102.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,158.94 : 28,749.89 = 8,064.91 : x
  2. Step 2: Convert to fraction form
    19,158.94/28,749.89 = 8,064.91/x
  3. Step 3: Cross multiply
    19,158.94x = 28,749.89 × 8,064.91
  4. Step 4: Simplify right side
    19,158.94x = 231,865,275.36
  5. Step 5: Solve for x
    x = 231,865,275.36/19,158.94
  6. Step 6: Final answer
    x = 12,102.20

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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.