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Finding the Fourth Proportional to 18,885.94, 28,304.62 and 7,800.41

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Solution

The fourth proportional to 18,885.94, 28,304.62 and 7,800.41 is: 11,690.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,885.94 : 28,304.62 = 7,800.41 : x
  2. Step 2: Convert to fraction form
    18,885.94/28,304.62 = 7,800.41/x
  3. Step 3: Cross multiply
    18,885.94x = 28,304.62 × 7,800.41
  4. Step 4: Simplify right side
    18,885.94x = 220,787,640.89
  5. Step 5: Solve for x
    x = 220,787,640.89/18,885.94
  6. Step 6: Final answer
    x = 11,690.58

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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.