Home / 21,152.16-29,190.78-11,720.64

Finding the Fourth Proportional to 21,152.16, 29,190.78 and 11,720.64

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Solution

The fourth proportional to 21,152.16, 29,190.78 and 11,720.64 is: 16,174.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,152.16 : 29,190.78 = 11,720.64 : x
  2. Step 2: Convert to fraction form
    21,152.16/29,190.78 = 11,720.64/x
  3. Step 3: Cross multiply
    21,152.16x = 29,190.78 × 11,720.64
  4. Step 4: Simplify right side
    21,152.16x = 342,134,623.70
  5. Step 5: Solve for x
    x = 342,134,623.70/21,152.16
  6. Step 6: Final answer
    x = 16,174.93

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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.