Home / 21,921.24-30,251.62-12,968.52

Finding the Fourth Proportional to 21,921.24, 30,251.62 and 12,968.52

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Solution

The fourth proportional to 21,921.24, 30,251.62 and 12,968.52 is: 17,896.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,921.24 : 30,251.62 = 12,968.52 : x
  2. Step 2: Convert to fraction form
    21,921.24/30,251.62 = 12,968.52/x
  3. Step 3: Cross multiply
    21,921.24x = 30,251.62 × 12,968.52
  4. Step 4: Simplify right side
    21,921.24x = 392,318,739.00
  5. Step 5: Solve for x
    x = 392,318,739.00/21,921.24
  6. Step 6: Final answer
    x = 17,896.74

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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.