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Finding the Fourth Proportional to 31,442.19, 43,393.41 and 18,015.23

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Solution

The fourth proportional to 31,442.19, 43,393.41 and 18,015.23 is: 24,862.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,442.19 : 43,393.41 = 18,015.23 : x
  2. Step 2: Convert to fraction form
    31,442.19/43,393.41 = 18,015.23/x
  3. Step 3: Cross multiply
    31,442.19x = 43,393.41 × 18,015.23
  4. Step 4: Simplify right side
    31,442.19x = 781,742,108.11
  5. Step 5: Solve for x
    x = 781,742,108.11/31,442.19
  6. Step 6: Final answer
    x = 24,862.84

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.