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Finding the Fourth Proportional to 18,710.25, 27,980.12 and 13,969.73

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Solution

The fourth proportional to 18,710.25, 27,980.12 and 13,969.73 is: 20,890.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,710.25 : 27,980.12 = 13,969.73 : x
  2. Step 2: Convert to fraction form
    18,710.25/27,980.12 = 13,969.73/x
  3. Step 3: Cross multiply
    18,710.25x = 27,980.12 × 13,969.73
  4. Step 4: Simplify right side
    18,710.25x = 390,874,721.77
  5. Step 5: Solve for x
    x = 390,874,721.77/18,710.25
  6. Step 6: Final answer
    x = 20,890.94

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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.