Home / 21,685.99-29,910.15-18,666.25

Finding the Fourth Proportional to 21,685.99, 29,910.15 and 18,666.25

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Solution

The fourth proportional to 21,685.99, 29,910.15 and 18,666.25 is: 25,745.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,685.99 : 29,910.15 = 18,666.25 : x
  2. Step 2: Convert to fraction form
    21,685.99/29,910.15 = 18,666.25/x
  3. Step 3: Cross multiply
    21,685.99x = 29,910.15 × 18,666.25
  4. Step 4: Simplify right side
    21,685.99x = 558,310,187.89
  5. Step 5: Solve for x
    x = 558,310,187.89/21,685.99
  6. Step 6: Final answer
    x = 25,745.21

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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.