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Finding the Fourth Proportional to 43,665.76, 65,443.80 and 18,676.40

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Solution

The fourth proportional to 43,665.76, 65,443.80 and 18,676.40 is: 27,991.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,665.76 : 65,443.80 = 18,676.40 : x
  2. Step 2: Convert to fraction form
    43,665.76/65,443.80 = 18,676.40/x
  3. Step 3: Cross multiply
    43,665.76x = 65,443.80 × 18,676.40
  4. Step 4: Simplify right side
    43,665.76x = 1,222,254,586.32
  5. Step 5: Solve for x
    x = 1,222,254,586.32/43,665.76
  6. Step 6: Final answer
    x = 27,991.14

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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.