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Finding the Fourth Proportional to 21,487.86, 29,643.48 and 13,936.10

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Solution

The fourth proportional to 21,487.86, 29,643.48 and 13,936.10 is: 19,225.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,487.86 : 29,643.48 = 13,936.10 : x
  2. Step 2: Convert to fraction form
    21,487.86/29,643.48 = 13,936.10/x
  3. Step 3: Cross multiply
    21,487.86x = 29,643.48 × 13,936.10
  4. Step 4: Simplify right side
    21,487.86x = 413,114,353.41
  5. Step 5: Solve for x
    x = 413,114,353.41/21,487.86
  6. Step 6: Final answer
    x = 19,225.48

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.