Home / 21,630.80-29,848.32-12,198.80

Finding the Fourth Proportional to 21,630.80, 29,848.32 and 12,198.80

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Solution

The fourth proportional to 21,630.80, 29,848.32 and 12,198.80 is: 16,833.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,630.80 : 29,848.32 = 12,198.80 : x
  2. Step 2: Convert to fraction form
    21,630.80/29,848.32 = 12,198.80/x
  3. Step 3: Cross multiply
    21,630.80x = 29,848.32 × 12,198.80
  4. Step 4: Simplify right side
    21,630.80x = 364,113,686.02
  5. Step 5: Solve for x
    x = 364,113,686.02/21,630.80
  6. Step 6: Final answer
    x = 16,833.11

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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.