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Finding the Fourth Proportional to 8,866.06, 12,161.81 and 8,681.51

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Solution

The fourth proportional to 8,866.06, 12,161.81 and 8,681.51 is: 11,908.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,866.06 : 12,161.81 = 8,681.51 : x
  2. Step 2: Convert to fraction form
    8,866.06/12,161.81 = 8,681.51/x
  3. Step 3: Cross multiply
    8,866.06x = 12,161.81 × 8,681.51
  4. Step 4: Simplify right side
    8,866.06x = 105,582,927.24
  5. Step 5: Solve for x
    x = 105,582,927.24/8,866.06
  6. Step 6: Final answer
    x = 11,908.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.