Home / 21,012.21-31,531.68-9,919.26

Finding the Fourth Proportional to 21,012.21, 31,531.68 and 9,919.26

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Solution

The fourth proportional to 21,012.21, 31,531.68 and 9,919.26 is: 14,885.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,012.21 : 31,531.68 = 9,919.26 : x
  2. Step 2: Convert to fraction form
    21,012.21/31,531.68 = 9,919.26/x
  3. Step 3: Cross multiply
    21,012.21x = 31,531.68 × 9,919.26
  4. Step 4: Simplify right side
    21,012.21x = 312,770,932.16
  5. Step 5: Solve for x
    x = 312,770,932.16/21,012.21
  6. Step 6: Final answer
    x = 14,885.20

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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.