Home / 20,871.44-28,802.58-11,439.98

Finding the Fourth Proportional to 20,871.44, 28,802.58 and 11,439.98

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Solution

The fourth proportional to 20,871.44, 28,802.58 and 11,439.98 is: 15,787.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,871.44 : 28,802.58 = 11,439.98 : x
  2. Step 2: Convert to fraction form
    20,871.44/28,802.58 = 11,439.98/x
  3. Step 3: Cross multiply
    20,871.44x = 28,802.58 × 11,439.98
  4. Step 4: Simplify right side
    20,871.44x = 329,500,939.15
  5. Step 5: Solve for x
    x = 329,500,939.15/20,871.44
  6. Step 6: Final answer
    x = 15,787.17

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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.