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Finding the Fourth Proportional to 20,659, 28,584.48 and 18,011.92

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Solution

The fourth proportional to 20,659, 28,584.48 and 18,011.92 is: 24,921.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,659 : 28,584.48 = 18,011.92 : x
  2. Step 2: Convert to fraction form
    20,659/28,584.48 = 18,011.92/x
  3. Step 3: Cross multiply
    20,659x = 28,584.48 × 18,011.92
  4. Step 4: Simplify right side
    20,659x = 514,861,367.00
  5. Step 5: Solve for x
    x = 514,861,367.00/20,659
  6. Step 6: Final answer
    x = 24,921.89

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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.