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Finding the Fourth Proportional to 15,920.77, 21,977.77 and 11,671.83

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Solution

The fourth proportional to 15,920.77, 21,977.77 and 11,671.83 is: 16,112.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,920.77 : 21,977.77 = 11,671.83 : x
  2. Step 2: Convert to fraction form
    15,920.77/21,977.77 = 11,671.83/x
  3. Step 3: Cross multiply
    15,920.77x = 21,977.77 × 11,671.83
  4. Step 4: Simplify right side
    15,920.77x = 256,520,795.22
  5. Step 5: Solve for x
    x = 256,520,795.22/15,920.77
  6. Step 6: Final answer
    x = 16,112.34

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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.