Home / 21,160.85-29,199.83-12,661.25

Finding the Fourth Proportional to 21,160.85, 29,199.83 and 12,661.25

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Solution

The fourth proportional to 21,160.85, 29,199.83 and 12,661.25 is: 17,471.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,160.85 : 29,199.83 = 12,661.25 : x
  2. Step 2: Convert to fraction form
    21,160.85/29,199.83 = 12,661.25/x
  3. Step 3: Cross multiply
    21,160.85x = 29,199.83 × 12,661.25
  4. Step 4: Simplify right side
    21,160.85x = 369,706,138.28
  5. Step 5: Solve for x
    x = 369,706,138.28/21,160.85
  6. Step 6: Final answer
    x = 17,471.24

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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.