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Finding the Fourth Proportional to 19,138.52, 26,415.60 and 12,074.60

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Solution

The fourth proportional to 19,138.52, 26,415.60 and 12,074.60 is: 16,665.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,138.52 : 26,415.60 = 12,074.60 : x
  2. Step 2: Convert to fraction form
    19,138.52/26,415.60 = 12,074.60/x
  3. Step 3: Cross multiply
    19,138.52x = 26,415.60 × 12,074.60
  4. Step 4: Simplify right side
    19,138.52x = 318,957,803.76
  5. Step 5: Solve for x
    x = 318,957,803.76/19,138.52
  6. Step 6: Final answer
    x = 16,665.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.