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Finding the Fourth Proportional to 13,871.88, 20,804.40 and 4,008.96

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Solution

The fourth proportional to 13,871.88, 20,804.40 and 4,008.96 is: 6,012.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,871.88 : 20,804.40 = 4,008.96 : x
  2. Step 2: Convert to fraction form
    13,871.88/20,804.40 = 4,008.96/x
  3. Step 3: Cross multiply
    13,871.88x = 20,804.40 × 4,008.96
  4. Step 4: Simplify right side
    13,871.88x = 83,404,007.42
  5. Step 5: Solve for x
    x = 83,404,007.42/13,871.88
  6. Step 6: Final answer
    x = 6,012.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.