Home / 19,921.80-29,882.70-11,611.20

Finding the Fourth Proportional to 19,921.80, 29,882.70 and 11,611.20

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Solution

The fourth proportional to 19,921.80, 29,882.70 and 11,611.20 is: 17,416.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,921.80 : 29,882.70 = 11,611.20 : x
  2. Step 2: Convert to fraction form
    19,921.80/29,882.70 = 11,611.20/x
  3. Step 3: Cross multiply
    19,921.80x = 29,882.70 × 11,611.20
  4. Step 4: Simplify right side
    19,921.80x = 346,974,006.24
  5. Step 5: Solve for x
    x = 346,974,006.24/19,921.80
  6. Step 6: Final answer
    x = 17,416.80

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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.