Home / 21,140.92-29,174.10-11,709.28

Finding the Fourth Proportional to 21,140.92, 29,174.10 and 11,709.28

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Solution

The fourth proportional to 21,140.92, 29,174.10 and 11,709.28 is: 16,158.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,140.92 : 29,174.10 = 11,709.28 : x
  2. Step 2: Convert to fraction form
    21,140.92/29,174.10 = 11,709.28/x
  3. Step 3: Cross multiply
    21,140.92x = 29,174.10 × 11,709.28
  4. Step 4: Simplify right side
    21,140.92x = 341,607,705.65
  5. Step 5: Solve for x
    x = 341,607,705.65/21,140.92
  6. Step 6: Final answer
    x = 16,158.60

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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.