Home / 21,914.08-30,241.52-11,978.08

Finding the Fourth Proportional to 21,914.08, 30,241.52 and 11,978.08

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Solution

The fourth proportional to 21,914.08, 30,241.52 and 11,978.08 is: 16,529.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,914.08 : 30,241.52 = 11,978.08 : x
  2. Step 2: Convert to fraction form
    21,914.08/30,241.52 = 11,978.08/x
  3. Step 3: Cross multiply
    21,914.08x = 30,241.52 × 11,978.08
  4. Step 4: Simplify right side
    21,914.08x = 362,235,345.88
  5. Step 5: Solve for x
    x = 362,235,345.88/21,914.08
  6. Step 6: Final answer
    x = 16,529.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.