Home / 13,690.96-18,775.65-13,122.88

Finding the Fourth Proportional to 13,690.96, 18,775.65 and 13,122.88

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Solution

The fourth proportional to 13,690.96, 18,775.65 and 13,122.88 is: 17,996.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,690.96 : 18,775.65 = 13,122.88 : x
  2. Step 2: Convert to fraction form
    13,690.96/18,775.65 = 13,122.88/x
  3. Step 3: Cross multiply
    13,690.96x = 18,775.65 × 13,122.88
  4. Step 4: Simplify right side
    13,690.96x = 246,390,601.87
  5. Step 5: Solve for x
    x = 246,390,601.87/13,690.96
  6. Step 6: Final answer
    x = 17,996.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.