Home / 40,687.48-61,018.26-12,979

Finding the Fourth Proportional to 40,687.48, 61,018.26 and 12,979

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Solution

The fourth proportional to 40,687.48, 61,018.26 and 12,979 is: 19,464.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,687.48 : 61,018.26 = 12,979 : x
  2. Step 2: Convert to fraction form
    40,687.48/61,018.26 = 12,979/x
  3. Step 3: Cross multiply
    40,687.48x = 61,018.26 × 12,979
  4. Step 4: Simplify right side
    40,687.48x = 791,955,996.54
  5. Step 5: Solve for x
    x = 791,955,996.54/40,687.48
  6. Step 6: Final answer
    x = 19,464.37

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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.