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Finding the Fourth Proportional to 43,978.56, 65,957.76 and 14,388.16

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Solution

The fourth proportional to 43,978.56, 65,957.76 and 14,388.16 is: 21,578.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,978.56 : 65,957.76 = 14,388.16 : x
  2. Step 2: Convert to fraction form
    43,978.56/65,957.76 = 14,388.16/x
  3. Step 3: Cross multiply
    43,978.56x = 65,957.76 × 14,388.16
  4. Step 4: Simplify right side
    43,978.56x = 949,010,804.12
  5. Step 5: Solve for x
    x = 949,010,804.12/43,978.56
  6. Step 6: Final answer
    x = 21,578.94

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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.