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Finding the Fourth Proportional to 19,291, 28,936.47 and 12,669.30

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Solution

The fourth proportional to 19,291, 28,936.47 and 12,669.30 is: 19,003.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,291 : 28,936.47 = 12,669.30 : x
  2. Step 2: Convert to fraction form
    19,291/28,936.47 = 12,669.30/x
  3. Step 3: Cross multiply
    19,291x = 28,936.47 × 12,669.30
  4. Step 4: Simplify right side
    19,291x = 366,604,819.37
  5. Step 5: Solve for x
    x = 366,604,819.37/19,291
  6. Step 6: Final answer
    x = 19,003.93

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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.