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Finding the Fourth Proportional to 19,031.73, 28,555.80 and 7,940.61

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Solution

The fourth proportional to 19,031.73, 28,555.80 and 7,940.61 is: 11,914.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,031.73 : 28,555.80 = 7,940.61 : x
  2. Step 2: Convert to fraction form
    19,031.73/28,555.80 = 7,940.61/x
  3. Step 3: Cross multiply
    19,031.73x = 28,555.80 × 7,940.61
  4. Step 4: Simplify right side
    19,031.73x = 226,750,471.04
  5. Step 5: Solve for x
    x = 226,750,471.04/19,031.73
  6. Step 6: Final answer
    x = 11,914.34

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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.