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Finding the Fourth Proportional to 21,268.34, 29,352.01 and 12,316

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Solution

The fourth proportional to 21,268.34, 29,352.01 and 12,316 is: 16,997.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,268.34 : 29,352.01 = 12,316 : x
  2. Step 2: Convert to fraction form
    21,268.34/29,352.01 = 12,316/x
  3. Step 3: Cross multiply
    21,268.34x = 29,352.01 × 12,316
  4. Step 4: Simplify right side
    21,268.34x = 361,499,355.16
  5. Step 5: Solve for x
    x = 361,499,355.16/21,268.34
  6. Step 6: Final answer
    x = 16,997.06

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Why These Related Problems?

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