Home / 21,932.56-30,264.60-12,980.44

Finding the Fourth Proportional to 21,932.56, 30,264.60 and 12,980.44

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Solution

The fourth proportional to 21,932.56, 30,264.60 and 12,980.44 is: 17,911.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,932.56 : 30,264.60 = 12,980.44 : x
  2. Step 2: Convert to fraction form
    21,932.56/30,264.60 = 12,980.44/x
  3. Step 3: Cross multiply
    21,932.56x = 30,264.60 × 12,980.44
  4. Step 4: Simplify right side
    21,932.56x = 392,847,824.42
  5. Step 5: Solve for x
    x = 392,847,824.42/21,932.56
  6. Step 6: Final answer
    x = 17,911.63

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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.