Home / 31,490-43,442.44-19,379.68

Finding the Fourth Proportional to 31,490, 43,442.44 and 19,379.68

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Solution

The fourth proportional to 31,490, 43,442.44 and 19,379.68 is: 26,735.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,490 : 43,442.44 = 19,379.68 : x
  2. Step 2: Convert to fraction form
    31,490/43,442.44 = 19,379.68/x
  3. Step 3: Cross multiply
    31,490x = 43,442.44 × 19,379.68
  4. Step 4: Simplify right side
    31,490x = 841,900,585.62
  5. Step 5: Solve for x
    x = 841,900,585.62/31,490
  6. Step 6: Final answer
    x = 26,735.49

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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.