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Finding the Fourth Proportional to 36,978.44, 51,035.56 and 21,064.40

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Solution

The fourth proportional to 36,978.44, 51,035.56 and 21,064.40 is: 29,071.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,978.44 : 51,035.56 = 21,064.40 : x
  2. Step 2: Convert to fraction form
    36,978.44/51,035.56 = 21,064.40/x
  3. Step 3: Cross multiply
    36,978.44x = 51,035.56 × 21,064.40
  4. Step 4: Simplify right side
    36,978.44x = 1,075,033,450.06
  5. Step 5: Solve for x
    x = 1,075,033,450.06/36,978.44
  6. Step 6: Final answer
    x = 29,071.90

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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.