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Finding the Fourth Proportional to 19,188.78, 28,730.02 and 9,808.60

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Solution

The fourth proportional to 19,188.78, 28,730.02 and 9,808.60 is: 14,685.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,188.78 : 28,730.02 = 9,808.60 : x
  2. Step 2: Convert to fraction form
    19,188.78/28,730.02 = 9,808.60/x
  3. Step 3: Cross multiply
    19,188.78x = 28,730.02 × 9,808.60
  4. Step 4: Simplify right side
    19,188.78x = 281,801,274.17
  5. Step 5: Solve for x
    x = 281,801,274.17/19,188.78
  6. Step 6: Final answer
    x = 14,685.73

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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.