Home / 21,017.82-31,520.40-17,310.84

Finding the Fourth Proportional to 21,017.82, 31,520.40 and 17,310.84

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Solution

The fourth proportional to 21,017.82, 31,520.40 and 17,310.84 is: 25,961.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,017.82 : 31,520.40 = 17,310.84 : x
  2. Step 2: Convert to fraction form
    21,017.82/31,520.40 = 17,310.84/x
  3. Step 3: Cross multiply
    21,017.82x = 31,520.40 × 17,310.84
  4. Step 4: Simplify right side
    21,017.82x = 545,644,601.14
  5. Step 5: Solve for x
    x = 545,644,601.14/21,017.82
  6. Step 6: Final answer
    x = 25,961.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.