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Finding the Fourth Proportional to 12,689.86, 19,037.11 and 3,924.18

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Solution

The fourth proportional to 12,689.86, 19,037.11 and 3,924.18 is: 5,886.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,689.86 : 19,037.11 = 3,924.18 : x
  2. Step 2: Convert to fraction form
    12,689.86/19,037.11 = 3,924.18/x
  3. Step 3: Cross multiply
    12,689.86x = 19,037.11 × 3,924.18
  4. Step 4: Simplify right side
    12,689.86x = 74,705,046.32
  5. Step 5: Solve for x
    x = 74,705,046.32/12,689.86
  6. Step 6: Final answer
    x = 5,886.99

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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.