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Finding the Fourth Proportional to 38,453.16, 53,065.06 and 20,789.16

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Solution

The fourth proportional to 38,453.16, 53,065.06 and 20,789.16 is: 28,688.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,453.16 : 53,065.06 = 20,789.16 : x
  2. Step 2: Convert to fraction form
    38,453.16/53,065.06 = 20,789.16/x
  3. Step 3: Cross multiply
    38,453.16x = 53,065.06 × 20,789.16
  4. Step 4: Simplify right side
    38,453.16x = 1,103,178,022.75
  5. Step 5: Solve for x
    x = 1,103,178,022.75/38,453.16
  6. Step 6: Final answer
    x = 28,688.88

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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.