Home / 21,173.76-29,213.10-12,220.08

Finding the Fourth Proportional to 21,173.76, 29,213.10 and 12,220.08

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Solution

The fourth proportional to 21,173.76, 29,213.10 and 12,220.08 is: 16,859.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,173.76 : 29,213.10 = 12,220.08 : x
  2. Step 2: Convert to fraction form
    21,173.76/29,213.10 = 12,220.08/x
  3. Step 3: Cross multiply
    21,173.76x = 29,213.10 × 12,220.08
  4. Step 4: Simplify right side
    21,173.76x = 356,986,419.05
  5. Step 5: Solve for x
    x = 356,986,419.05/21,173.76
  6. Step 6: Final answer
    x = 16,859.85

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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.