Home / 21,152.12-29,189.94-11,720.84

Finding the Fourth Proportional to 21,152.12, 29,189.94 and 11,720.84

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Solution

The fourth proportional to 21,152.12, 29,189.94 and 11,720.84 is: 16,174.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,152.12 : 29,189.94 = 11,720.84 : x
  2. Step 2: Convert to fraction form
    21,152.12/29,189.94 = 11,720.84/x
  3. Step 3: Cross multiply
    21,152.12x = 29,189.94 × 11,720.84
  4. Step 4: Simplify right side
    21,152.12x = 342,130,616.35
  5. Step 5: Solve for x
    x = 342,130,616.35/21,152.12
  6. Step 6: Final answer
    x = 16,174.77

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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.