Home / 13,985.74-20,956.44-8,431.84

Finding the Fourth Proportional to 13,985.74, 20,956.44 and 8,431.84

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Solution

The fourth proportional to 13,985.74, 20,956.44 and 8,431.84 is: 12,634.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,985.74 : 20,956.44 = 8,431.84 : x
  2. Step 2: Convert to fraction form
    13,985.74/20,956.44 = 8,431.84/x
  3. Step 3: Cross multiply
    13,985.74x = 20,956.44 × 8,431.84
  4. Step 4: Simplify right side
    13,985.74x = 176,701,349.05
  5. Step 5: Solve for x
    x = 176,701,349.05/13,985.74
  6. Step 6: Final answer
    x = 12,634.39

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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.