Home / 21,429.77-29,570.67-11,869.84

Finding the Fourth Proportional to 21,429.77, 29,570.67 and 11,869.84

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Solution

The fourth proportional to 21,429.77, 29,570.67 and 11,869.84 is: 16,379.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,429.77 : 29,570.67 = 11,869.84 : x
  2. Step 2: Convert to fraction form
    21,429.77/29,570.67 = 11,869.84/x
  3. Step 3: Cross multiply
    21,429.77x = 29,570.67 × 11,869.84
  4. Step 4: Simplify right side
    21,429.77x = 350,999,158.56
  5. Step 5: Solve for x
    x = 350,999,158.56/21,429.77
  6. Step 6: Final answer
    x = 16,379.05

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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.