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Finding the Fourth Proportional to 18,641.80, 27,930.30 and 15,725.80

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Solution

The fourth proportional to 18,641.80, 27,930.30 and 15,725.80 is: 23,561.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,641.80 : 27,930.30 = 15,725.80 : x
  2. Step 2: Convert to fraction form
    18,641.80/27,930.30 = 15,725.80/x
  3. Step 3: Cross multiply
    18,641.80x = 27,930.30 × 15,725.80
  4. Step 4: Simplify right side
    18,641.80x = 439,226,311.74
  5. Step 5: Solve for x
    x = 439,226,311.74/18,641.80
  6. Step 6: Final answer
    x = 23,561.37

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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.