Home / 12,369.40-18,575.70-11,980.60

Finding the Fourth Proportional to 12,369.40, 18,575.70 and 11,980.60

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Solution

The fourth proportional to 12,369.40, 18,575.70 and 11,980.60 is: 17,991.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,369.40 : 18,575.70 = 11,980.60 : x
  2. Step 2: Convert to fraction form
    12,369.40/18,575.70 = 11,980.60/x
  3. Step 3: Cross multiply
    12,369.40x = 18,575.70 × 11,980.60
  4. Step 4: Simplify right side
    12,369.40x = 222,548,031.42
  5. Step 5: Solve for x
    x = 222,548,031.42/12,369.40
  6. Step 6: Final answer
    x = 17,991.82

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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.