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Finding the Fourth Proportional to 15,935.05, 21,989.46 and 8,860.06

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Solution

The fourth proportional to 15,935.05, 21,989.46 and 8,860.06 is: 12,226.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,935.05 : 21,989.46 = 8,860.06 : x
  2. Step 2: Convert to fraction form
    15,935.05/21,989.46 = 8,860.06/x
  3. Step 3: Cross multiply
    15,935.05x = 21,989.46 × 8,860.06
  4. Step 4: Simplify right side
    15,935.05x = 194,827,934.97
  5. Step 5: Solve for x
    x = 194,827,934.97/15,935.05
  6. Step 6: Final answer
    x = 12,226.38

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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.