Home / 21,429.47-29,571.67-11,868.71

Finding the Fourth Proportional to 21,429.47, 29,571.67 and 11,868.71

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Solution

The fourth proportional to 21,429.47, 29,571.67 and 11,868.71 is: 16,378.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,429.47 : 29,571.67 = 11,868.71 : x
  2. Step 2: Convert to fraction form
    21,429.47/29,571.67 = 11,868.71/x
  3. Step 3: Cross multiply
    21,429.47x = 29,571.67 × 11,868.71
  4. Step 4: Simplify right side
    21,429.47x = 350,977,575.45
  5. Step 5: Solve for x
    x = 350,977,575.45/21,429.47
  6. Step 6: Final answer
    x = 16,378.27

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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.