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Finding the Fourth Proportional to 21,881.52, 32,832.99 and 13,559.31

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Solution

The fourth proportional to 21,881.52, 32,832.99 and 13,559.31 is: 20,345.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,881.52 : 32,832.99 = 13,559.31 : x
  2. Step 2: Convert to fraction form
    21,881.52/32,832.99 = 13,559.31/x
  3. Step 3: Cross multiply
    21,881.52x = 32,832.99 × 13,559.31
  4. Step 4: Simplify right side
    21,881.52x = 445,192,689.64
  5. Step 5: Solve for x
    x = 445,192,689.64/21,881.52
  6. Step 6: Final answer
    x = 20,345.60

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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.