Home / 21,429.68-29,571.47-11,868.88

Finding the Fourth Proportional to 21,429.68, 29,571.47 and 11,868.88

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Solution

The fourth proportional to 21,429.68, 29,571.47 and 11,868.88 is: 16,378.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,429.68 : 29,571.47 = 11,868.88 : x
  2. Step 2: Convert to fraction form
    21,429.68/29,571.47 = 11,868.88/x
  3. Step 3: Cross multiply
    21,429.68x = 29,571.47 × 11,868.88
  4. Step 4: Simplify right side
    21,429.68x = 350,980,228.85
  5. Step 5: Solve for x
    x = 350,980,228.85/21,429.68
  6. Step 6: Final answer
    x = 16,378.23

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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.