Home / 21,809.44-30,096.30-12,856.78

Finding the Fourth Proportional to 21,809.44, 30,096.30 and 12,856.78

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Solution

The fourth proportional to 21,809.44, 30,096.30 and 12,856.78 is: 17,741.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,809.44 : 30,096.30 = 12,856.78 : x
  2. Step 2: Convert to fraction form
    21,809.44/30,096.30 = 12,856.78/x
  3. Step 3: Cross multiply
    21,809.44x = 30,096.30 × 12,856.78
  4. Step 4: Simplify right side
    21,809.44x = 386,941,507.91
  5. Step 5: Solve for x
    x = 386,941,507.91/21,809.44
  6. Step 6: Final answer
    x = 17,741.93

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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.