Home / 14,725.30-20,321.40-8,438.88

Finding the Fourth Proportional to 14,725.30, 20,321.40 and 8,438.88

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Solution

The fourth proportional to 14,725.30, 20,321.40 and 8,438.88 is: 11,645.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,725.30 : 20,321.40 = 8,438.88 : x
  2. Step 2: Convert to fraction form
    14,725.30/20,321.40 = 8,438.88/x
  3. Step 3: Cross multiply
    14,725.30x = 20,321.40 × 8,438.88
  4. Step 4: Simplify right side
    14,725.30x = 171,489,856.03
  5. Step 5: Solve for x
    x = 171,489,856.03/14,725.30
  6. Step 6: Final answer
    x = 11,645.93

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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.