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Finding the Fourth Proportional to 19,289.86, 28,901.72 and 12,952.86

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Solution

The fourth proportional to 19,289.86, 28,901.72 and 12,952.86 is: 19,407.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,289.86 : 28,901.72 = 12,952.86 : x
  2. Step 2: Convert to fraction form
    19,289.86/28,901.72 = 12,952.86/x
  3. Step 3: Cross multiply
    19,289.86x = 28,901.72 × 12,952.86
  4. Step 4: Simplify right side
    19,289.86x = 374,359,932.92
  5. Step 5: Solve for x
    x = 374,359,932.92/19,289.86
  6. Step 6: Final answer
    x = 19,407.08

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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.