Home / 21,611.36-29,816.82-12,178.10

Finding the Fourth Proportional to 21,611.36, 29,816.82 and 12,178.10

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Solution

The fourth proportional to 21,611.36, 29,816.82 and 12,178.10 is: 16,801.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,611.36 : 29,816.82 = 12,178.10 : x
  2. Step 2: Convert to fraction form
    21,611.36/29,816.82 = 12,178.10/x
  3. Step 3: Cross multiply
    21,611.36x = 29,816.82 × 12,178.10
  4. Step 4: Simplify right side
    21,611.36x = 363,112,215.64
  5. Step 5: Solve for x
    x = 363,112,215.64/21,611.36
  6. Step 6: Final answer
    x = 16,801.91

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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.