Home / 13,461.58-20,171.38-8,520.78

Finding the Fourth Proportional to 13,461.58, 20,171.38 and 8,520.78

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Solution

The fourth proportional to 13,461.58, 20,171.38 and 8,520.78 is: 12,767.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,461.58 : 20,171.38 = 8,520.78 : x
  2. Step 2: Convert to fraction form
    13,461.58/20,171.38 = 8,520.78/x
  3. Step 3: Cross multiply
    13,461.58x = 20,171.38 × 8,520.78
  4. Step 4: Simplify right side
    13,461.58x = 171,875,891.28
  5. Step 5: Solve for x
    x = 171,875,891.28/13,461.58
  6. Step 6: Final answer
    x = 12,767.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.