Home / 20,871.56-28,803.02-11,439.92

Finding the Fourth Proportional to 20,871.56, 28,803.02 and 11,439.92

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Solution

The fourth proportional to 20,871.56, 28,803.02 and 11,439.92 is: 15,787.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,871.56 : 28,803.02 = 11,439.92 : x
  2. Step 2: Convert to fraction form
    20,871.56/28,803.02 = 11,439.92/x
  3. Step 3: Cross multiply
    20,871.56x = 28,803.02 × 11,439.92
  4. Step 4: Simplify right side
    20,871.56x = 329,504,244.56
  5. Step 5: Solve for x
    x = 329,504,244.56/20,871.56
  6. Step 6: Final answer
    x = 15,787.24

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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.