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Finding the Fourth Proportional to 21,816.51, 32,736.51 and 8,669.00

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Solution

The fourth proportional to 21,816.51, 32,736.51 and 8,669.00 is: 13,008.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,816.51 : 32,736.51 = 8,669.00 : x
  2. Step 2: Convert to fraction form
    21,816.51/32,736.51 = 8,669.00/x
  3. Step 3: Cross multiply
    21,816.51x = 32,736.51 × 8,669.00
  4. Step 4: Simplify right side
    21,816.51x = 283,792,641.51
  5. Step 5: Solve for x
    x = 283,792,641.51/21,816.51
  6. Step 6: Final answer
    x = 13,008.16

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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.