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Finding the Fourth Proportional to 19,860.99, 27,410.06 and 11,361.42

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Solution

The fourth proportional to 19,860.99, 27,410.06 and 11,361.42 is: 15,679.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,860.99 : 27,410.06 = 11,361.42 : x
  2. Step 2: Convert to fraction form
    19,860.99/27,410.06 = 11,361.42/x
  3. Step 3: Cross multiply
    19,860.99x = 27,410.06 × 11,361.42
  4. Step 4: Simplify right side
    19,860.99x = 311,417,232.29
  5. Step 5: Solve for x
    x = 311,417,232.29/19,860.99
  6. Step 6: Final answer
    x = 15,679.85

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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.