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Finding the Fourth Proportional to 19,865.01, 27,410.72 and 12,800.91

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Solution

The fourth proportional to 19,865.01, 27,410.72 and 12,800.91 is: 17,663.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,865.01 : 27,410.72 = 12,800.91 : x
  2. Step 2: Convert to fraction form
    19,865.01/27,410.72 = 12,800.91/x
  3. Step 3: Cross multiply
    19,865.01x = 27,410.72 × 12,800.91
  4. Step 4: Simplify right side
    19,865.01x = 350,882,095.75
  5. Step 5: Solve for x
    x = 350,882,095.75/19,865.01
  6. Step 6: Final answer
    x = 17,663.32

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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.