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Finding the Fourth Proportional to 19,008, 28,512.11 and 5,157

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Solution

The fourth proportional to 19,008, 28,512.11 and 5,157 is: 7,735.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,008 : 28,512.11 = 5,157 : x
  2. Step 2: Convert to fraction form
    19,008/28,512.11 = 5,157/x
  3. Step 3: Cross multiply
    19,008x = 28,512.11 × 5,157
  4. Step 4: Simplify right side
    19,008x = 147,036,925.49
  5. Step 5: Solve for x
    x = 147,036,925.49/19,008
  6. Step 6: Final answer
    x = 7,735.53

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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.