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Finding the Fourth Proportional to 18,611.61, 27,898.71 and 9,237.21

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Solution

The fourth proportional to 18,611.61, 27,898.71 and 9,237.21 is: 13,846.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,611.61 : 27,898.71 = 9,237.21 : x
  2. Step 2: Convert to fraction form
    18,611.61/27,898.71 = 9,237.21/x
  3. Step 3: Cross multiply
    18,611.61x = 27,898.71 × 9,237.21
  4. Step 4: Simplify right side
    18,611.61x = 257,706,243.00
  5. Step 5: Solve for x
    x = 257,706,243.00/18,611.61
  6. Step 6: Final answer
    x = 13,846.53

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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.