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Finding the Fourth Proportional to 19,139, 28,708.50 and 5,288

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Solution

The fourth proportional to 19,139, 28,708.50 and 5,288 is: 7,932

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,139 : 28,708.50 = 5,288 : x
  2. Step 2: Convert to fraction form
    19,139/28,708.50 = 5,288/x
  3. Step 3: Cross multiply
    19,139x = 28,708.50 × 5,288
  4. Step 4: Simplify right side
    19,139x = 151,810,548
  5. Step 5: Solve for x
    x = 151,810,548/19,139
  6. Step 6: Final answer
    x = 7,932

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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.