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Finding the Fourth Proportional to 31,848.51, 47,778.51 and 13,118.32

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Solution

The fourth proportional to 31,848.51, 47,778.51 and 13,118.32 is: 19,679.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,848.51 : 47,778.51 = 13,118.32 : x
  2. Step 2: Convert to fraction form
    31,848.51/47,778.51 = 13,118.32/x
  3. Step 3: Cross multiply
    31,848.51x = 47,778.51 × 13,118.32
  4. Step 4: Simplify right side
    31,848.51x = 626,773,818.43
  5. Step 5: Solve for x
    x = 626,773,818.43/31,848.51
  6. Step 6: Final answer
    x = 19,679.85

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