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Finding the Fourth Proportional to 19,344.34, 28,978.03 and 12,750.50

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Solution

The fourth proportional to 19,344.34, 28,978.03 and 12,750.50 is: 19,100.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,344.34 : 28,978.03 = 12,750.50 : x
  2. Step 2: Convert to fraction form
    19,344.34/28,978.03 = 12,750.50/x
  3. Step 3: Cross multiply
    19,344.34x = 28,978.03 × 12,750.50
  4. Step 4: Simplify right side
    19,344.34x = 369,484,371.52
  5. Step 5: Solve for x
    x = 369,484,371.52/19,344.34
  6. Step 6: Final answer
    x = 19,100.39

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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.