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Finding the Fourth Proportional to 12,718.95, 19,074.97 and 5,321.89

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Solution

The fourth proportional to 12,718.95, 19,074.97 and 5,321.89 is: 7,981.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,718.95 : 19,074.97 = 5,321.89 : x
  2. Step 2: Convert to fraction form
    12,718.95/19,074.97 = 5,321.89/x
  3. Step 3: Cross multiply
    12,718.95x = 19,074.97 × 5,321.89
  4. Step 4: Simplify right side
    12,718.95x = 101,514,892.09
  5. Step 5: Solve for x
    x = 101,514,892.09/12,718.95
  6. Step 6: Final answer
    x = 7,981.39

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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.