Home / 21,135.48-29,142.21-16,872.88

Finding the Fourth Proportional to 21,135.48, 29,142.21 and 16,872.88

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Solution

The fourth proportional to 21,135.48, 29,142.21 and 16,872.88 is: 23,264.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,135.48 : 29,142.21 = 16,872.88 : x
  2. Step 2: Convert to fraction form
    21,135.48/29,142.21 = 16,872.88/x
  3. Step 3: Cross multiply
    21,135.48x = 29,142.21 × 16,872.88
  4. Step 4: Simplify right side
    21,135.48x = 491,712,996.92
  5. Step 5: Solve for x
    x = 491,712,996.92/21,135.48
  6. Step 6: Final answer
    x = 23,264.81

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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.