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Finding the Fourth Proportional to 21,376.63, 32,070.48 and 8,892.64

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Solution

The fourth proportional to 21,376.63, 32,070.48 and 8,892.64 is: 13,341.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,376.63 : 32,070.48 = 8,892.64 : x
  2. Step 2: Convert to fraction form
    21,376.63/32,070.48 = 8,892.64/x
  3. Step 3: Cross multiply
    21,376.63x = 32,070.48 × 8,892.64
  4. Step 4: Simplify right side
    21,376.63x = 285,191,233.27
  5. Step 5: Solve for x
    x = 285,191,233.27/21,376.63
  6. Step 6: Final answer
    x = 13,341.26

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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.