Home / 21,121.16-29,153.70-12,174.65

Finding the Fourth Proportional to 21,121.16, 29,153.70 and 12,174.65

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Solution

The fourth proportional to 21,121.16, 29,153.70 and 12,174.65 is: 16,804.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,121.16 : 29,153.70 = 12,174.65 : x
  2. Step 2: Convert to fraction form
    21,121.16/29,153.70 = 12,174.65/x
  3. Step 3: Cross multiply
    21,121.16x = 29,153.70 × 12,174.65
  4. Step 4: Simplify right side
    21,121.16x = 354,935,887.06
  5. Step 5: Solve for x
    x = 354,935,887.06/21,121.16
  6. Step 6: Final answer
    x = 16,804.75

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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.