Home / 21,291.21-31,936.65-5,494.90

Finding the Fourth Proportional to 21,291.21, 31,936.65 and 5,494.90

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Solution

The fourth proportional to 21,291.21, 31,936.65 and 5,494.90 is: 8,242.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,291.21 : 31,936.65 = 5,494.90 : x
  2. Step 2: Convert to fraction form
    21,291.21/31,936.65 = 5,494.90/x
  3. Step 3: Cross multiply
    21,291.21x = 31,936.65 × 5,494.90
  4. Step 4: Simplify right side
    21,291.21x = 175,488,538.40
  5. Step 5: Solve for x
    x = 175,488,538.40/21,291.21
  6. Step 6: Final answer
    x = 8,242.30

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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.