Home / 19,730.56-27,221.20-12,660.80

Finding the Fourth Proportional to 19,730.56, 27,221.20 and 12,660.80

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Solution

The fourth proportional to 19,730.56, 27,221.20 and 12,660.80 is: 17,467.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,730.56 : 27,221.20 = 12,660.80 : x
  2. Step 2: Convert to fraction form
    19,730.56/27,221.20 = 12,660.80/x
  3. Step 3: Cross multiply
    19,730.56x = 27,221.20 × 12,660.80
  4. Step 4: Simplify right side
    19,730.56x = 344,642,168.96
  5. Step 5: Solve for x
    x = 344,642,168.96/19,730.56
  6. Step 6: Final answer
    x = 17,467.43

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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.