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Finding the Fourth Proportional to 18,212.61, 27,323.61 and 9,890.49

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Solution

The fourth proportional to 18,212.61, 27,323.61 and 9,890.49 is: 14,838.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,212.61 : 27,323.61 = 9,890.49 : x
  2. Step 2: Convert to fraction form
    18,212.61/27,323.61 = 9,890.49/x
  3. Step 3: Cross multiply
    18,212.61x = 27,323.61 × 9,890.49
  4. Step 4: Simplify right side
    18,212.61x = 270,243,891.47
  5. Step 5: Solve for x
    x = 270,243,891.47/18,212.61
  6. Step 6: Final answer
    x = 14,838.28

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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.