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Finding the Fourth Proportional to 18,649.30, 27,973.97 and 12,788.14

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Solution

The fourth proportional to 18,649.30, 27,973.97 and 12,788.14 is: 19,182.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,649.30 : 27,973.97 = 12,788.14 : x
  2. Step 2: Convert to fraction form
    18,649.30/27,973.97 = 12,788.14/x
  3. Step 3: Cross multiply
    18,649.30x = 27,973.97 × 12,788.14
  4. Step 4: Simplify right side
    18,649.30x = 357,735,044.72
  5. Step 5: Solve for x
    x = 357,735,044.72/18,649.30
  6. Step 6: Final answer
    x = 19,182.22

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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.