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Finding the Fourth Proportional to 20,952.01, 28,914.27 and 11,520.57

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Solution

The fourth proportional to 20,952.01, 28,914.27 and 11,520.57 is: 15,898.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,952.01 : 28,914.27 = 11,520.57 : x
  2. Step 2: Convert to fraction form
    20,952.01/28,914.27 = 11,520.57/x
  3. Step 3: Cross multiply
    20,952.01x = 28,914.27 × 11,520.57
  4. Step 4: Simplify right side
    20,952.01x = 333,108,871.53
  5. Step 5: Solve for x
    x = 333,108,871.53/20,952.01
  6. Step 6: Final answer
    x = 15,898.66

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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.