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Finding the Fourth Proportional to 18,624.48, 25,701.70 and 10,972.20

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Solution

The fourth proportional to 18,624.48, 25,701.70 and 10,972.20 is: 15,141.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,624.48 : 25,701.70 = 10,972.20 : x
  2. Step 2: Convert to fraction form
    18,624.48/25,701.70 = 10,972.20/x
  3. Step 3: Cross multiply
    18,624.48x = 25,701.70 × 10,972.20
  4. Step 4: Simplify right side
    18,624.48x = 282,004,192.74
  5. Step 5: Solve for x
    x = 282,004,192.74/18,624.48
  6. Step 6: Final answer
    x = 15,141.59

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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.