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Finding the Fourth Proportional to 15,892.11, 21,922.00 and 9,913.40

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Solution

The fourth proportional to 15,892.11, 21,922.00 and 9,913.40 is: 13,674.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,892.11 : 21,922.00 = 9,913.40 : x
  2. Step 2: Convert to fraction form
    15,892.11/21,922.00 = 9,913.40/x
  3. Step 3: Cross multiply
    15,892.11x = 21,922.00 × 9,913.40
  4. Step 4: Simplify right side
    15,892.11x = 217,321,420.41
  5. Step 5: Solve for x
    x = 217,321,420.41/15,892.11
  6. Step 6: Final answer
    x = 13,674.80

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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.