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Finding the Fourth Proportional to 18,411.84, 27,439.20 and 17,821.44

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Solution

The fourth proportional to 18,411.84, 27,439.20 and 17,821.44 is: 26,559.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,411.84 : 27,439.20 = 17,821.44 : x
  2. Step 2: Convert to fraction form
    18,411.84/27,439.20 = 17,821.44/x
  3. Step 3: Cross multiply
    18,411.84x = 27,439.20 × 17,821.44
  4. Step 4: Simplify right side
    18,411.84x = 489,006,056.45
  5. Step 5: Solve for x
    x = 489,006,056.45/18,411.84
  6. Step 6: Final answer
    x = 26,559.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.