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Finding the Fourth Proportional to 18,628.71, 27,905.58 and 8,619.36

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Solution

The fourth proportional to 18,628.71, 27,905.58 and 8,619.36 is: 12,911.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,628.71 : 27,905.58 = 8,619.36 : x
  2. Step 2: Convert to fraction form
    18,628.71/27,905.58 = 8,619.36/x
  3. Step 3: Cross multiply
    18,628.71x = 27,905.58 × 8,619.36
  4. Step 4: Simplify right side
    18,628.71x = 240,528,196.93
  5. Step 5: Solve for x
    x = 240,528,196.93/18,628.71
  6. Step 6: Final answer
    x = 12,911.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.