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Finding the Fourth Proportional to 19,978.36, 27,569.35 and 11,025.70

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Solution

The fourth proportional to 19,978.36, 27,569.35 and 11,025.70 is: 15,215.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,978.36 : 27,569.35 = 11,025.70 : x
  2. Step 2: Convert to fraction form
    19,978.36/27,569.35 = 11,025.70/x
  3. Step 3: Cross multiply
    19,978.36x = 27,569.35 × 11,025.70
  4. Step 4: Simplify right side
    19,978.36x = 303,971,382.30
  5. Step 5: Solve for x
    x = 303,971,382.30/19,978.36
  6. Step 6: Final answer
    x = 15,215.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.