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Finding the Fourth Proportional to 18,971.94, 28,472.43 and 8,590.98

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Solution

The fourth proportional to 18,971.94, 28,472.43 and 8,590.98 is: 12,893.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,971.94 : 28,472.43 = 8,590.98 : x
  2. Step 2: Convert to fraction form
    18,971.94/28,472.43 = 8,590.98/x
  3. Step 3: Cross multiply
    18,971.94x = 28,472.43 × 8,590.98
  4. Step 4: Simplify right side
    18,971.94x = 244,606,076.68
  5. Step 5: Solve for x
    x = 244,606,076.68/18,971.94
  6. Step 6: Final answer
    x = 12,893.05

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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.