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Finding the Fourth Proportional to 20,612.86, 28,444.02 and 11,658.30

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Solution

The fourth proportional to 20,612.86, 28,444.02 and 11,658.30 is: 16,087.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,612.86 : 28,444.02 = 11,658.30 : x
  2. Step 2: Convert to fraction form
    20,612.86/28,444.02 = 11,658.30/x
  3. Step 3: Cross multiply
    20,612.86x = 28,444.02 × 11,658.30
  4. Step 4: Simplify right side
    20,612.86x = 331,608,918.37
  5. Step 5: Solve for x
    x = 331,608,918.37/20,612.86
  6. Step 6: Final answer
    x = 16,087.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.