Home / 20,951.16-28,914.04-11,519.72

Finding the Fourth Proportional to 20,951.16, 28,914.04 and 11,519.72

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Solution

The fourth proportional to 20,951.16, 28,914.04 and 11,519.72 is: 15,898.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,951.16 : 28,914.04 = 11,519.72 : x
  2. Step 2: Convert to fraction form
    20,951.16/28,914.04 = 11,519.72/x
  3. Step 3: Cross multiply
    20,951.16x = 28,914.04 × 11,519.72
  4. Step 4: Simplify right side
    20,951.16x = 333,081,644.87
  5. Step 5: Solve for x
    x = 333,081,644.87/20,951.16
  6. Step 6: Final answer
    x = 15,898.00

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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.