Home / 21,787.65-30,056.49-13,815.99

Finding the Fourth Proportional to 21,787.65, 30,056.49 and 13,815.99

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Solution

The fourth proportional to 21,787.65, 30,056.49 and 13,815.99 is: 19,059.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,787.65 : 30,056.49 = 13,815.99 : x
  2. Step 2: Convert to fraction form
    21,787.65/30,056.49 = 13,815.99/x
  3. Step 3: Cross multiply
    21,787.65x = 30,056.49 × 13,815.99
  4. Step 4: Simplify right side
    21,787.65x = 415,260,165.28
  5. Step 5: Solve for x
    x = 415,260,165.28/21,787.65
  6. Step 6: Final answer
    x = 19,059.43

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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.