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Finding the Fourth Proportional to 15,841.44, 21,860.84 and 8,671.35

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Solution

The fourth proportional to 15,841.44, 21,860.84 and 8,671.35 is: 11,966.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,841.44 : 21,860.84 = 8,671.35 : x
  2. Step 2: Convert to fraction form
    15,841.44/21,860.84 = 8,671.35/x
  3. Step 3: Cross multiply
    15,841.44x = 21,860.84 × 8,671.35
  4. Step 4: Simplify right side
    15,841.44x = 189,562,994.93
  5. Step 5: Solve for x
    x = 189,562,994.93/15,841.44
  6. Step 6: Final answer
    x = 11,966.27

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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.