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Finding the Fourth Proportional to 21,780.29, 32,663.45 and 6,985.64

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Solution

The fourth proportional to 21,780.29, 32,663.45 and 6,985.64 is: 10,476.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,780.29 : 32,663.45 = 6,985.64 : x
  2. Step 2: Convert to fraction form
    21,780.29/32,663.45 = 6,985.64/x
  3. Step 3: Cross multiply
    21,780.29x = 32,663.45 × 6,985.64
  4. Step 4: Simplify right side
    21,780.29x = 228,175,201.98
  5. Step 5: Solve for x
    x = 228,175,201.98/21,780.29
  6. Step 6: Final answer
    x = 10,476.22

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