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Finding the Fourth Proportional to 13,888.21, 20,835.27 and 7,967.81

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Solution

The fourth proportional to 13,888.21, 20,835.27 and 7,967.81 is: 11,953.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,888.21 : 20,835.27 = 7,967.81 : x
  2. Step 2: Convert to fraction form
    13,888.21/20,835.27 = 7,967.81/x
  3. Step 3: Cross multiply
    13,888.21x = 20,835.27 × 7,967.81
  4. Step 4: Simplify right side
    13,888.21x = 166,011,524.75
  5. Step 5: Solve for x
    x = 166,011,524.75/13,888.21
  6. Step 6: Final answer
    x = 11,953.42

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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.