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Finding the Fourth Proportional to 19,038.27, 28,590.09 and 11,685.90

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Solution

The fourth proportional to 19,038.27, 28,590.09 and 11,685.90 is: 17,548.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,038.27 : 28,590.09 = 11,685.90 : x
  2. Step 2: Convert to fraction form
    19,038.27/28,590.09 = 11,685.90/x
  3. Step 3: Cross multiply
    19,038.27x = 28,590.09 × 11,685.90
  4. Step 4: Simplify right side
    19,038.27x = 334,100,932.73
  5. Step 5: Solve for x
    x = 334,100,932.73/19,038.27
  6. Step 6: Final answer
    x = 17,548.91

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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.