Home / 21,108.60-29,136.51-12,616.97

Finding the Fourth Proportional to 21,108.60, 29,136.51 and 12,616.97

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Solution

The fourth proportional to 21,108.60, 29,136.51 and 12,616.97 is: 17,415.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,108.60 : 29,136.51 = 12,616.97 : x
  2. Step 2: Convert to fraction form
    21,108.60/29,136.51 = 12,616.97/x
  3. Step 3: Cross multiply
    21,108.60x = 29,136.51 × 12,616.97
  4. Step 4: Simplify right side
    21,108.60x = 367,614,326.89
  5. Step 5: Solve for x
    x = 367,614,326.89/21,108.60
  6. Step 6: Final answer
    x = 17,415.38

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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.