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Finding the Fourth Proportional to 19,873.50, 27,425.43 and 18,389.58

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Solution

The fourth proportional to 19,873.50, 27,425.43 and 18,389.58 is: 25,377.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,873.50 : 27,425.43 = 18,389.58 : x
  2. Step 2: Convert to fraction form
    19,873.50/27,425.43 = 18,389.58/x
  3. Step 3: Cross multiply
    19,873.50x = 27,425.43 × 18,389.58
  4. Step 4: Simplify right side
    19,873.50x = 504,342,139.02
  5. Step 5: Solve for x
    x = 504,342,139.02/19,873.50
  6. Step 6: Final answer
    x = 25,377.62

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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.