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Finding the Fourth Proportional to 29,979.72, 45,006.84 and 19,415.16

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Solution

The fourth proportional to 29,979.72, 45,006.84 and 19,415.16 is: 29,146.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,979.72 : 45,006.84 = 19,415.16 : x
  2. Step 2: Convert to fraction form
    29,979.72/45,006.84 = 19,415.16/x
  3. Step 3: Cross multiply
    29,979.72x = 45,006.84 × 19,415.16
  4. Step 4: Simplify right side
    29,979.72x = 873,814,999.69
  5. Step 5: Solve for x
    x = 873,814,999.69/29,979.72
  6. Step 6: Final answer
    x = 29,146.87

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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.