Home / 20,871.63-28,802.84-11,439.99

Finding the Fourth Proportional to 20,871.63, 28,802.84 and 11,439.99

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Solution

The fourth proportional to 20,871.63, 28,802.84 and 11,439.99 is: 15,787.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,871.63 : 28,802.84 = 11,439.99 : x
  2. Step 2: Convert to fraction form
    20,871.63/28,802.84 = 11,439.99/x
  3. Step 3: Cross multiply
    20,871.63x = 28,802.84 × 11,439.99
  4. Step 4: Simplify right side
    20,871.63x = 329,504,201.57
  5. Step 5: Solve for x
    x = 329,504,201.57/20,871.63
  6. Step 6: Final answer
    x = 15,787.18

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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.