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Finding the Fourth Proportional to 18,411.40, 27,638.70 and 18,281.80

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Solution

The fourth proportional to 18,411.40, 27,638.70 and 18,281.80 is: 27,444.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,411.40 : 27,638.70 = 18,281.80 : x
  2. Step 2: Convert to fraction form
    18,411.40/27,638.70 = 18,281.80/x
  3. Step 3: Cross multiply
    18,411.40x = 27,638.70 × 18,281.80
  4. Step 4: Simplify right side
    18,411.40x = 505,285,185.66
  5. Step 5: Solve for x
    x = 505,285,185.66/18,411.40
  6. Step 6: Final answer
    x = 27,444.15

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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.