Home / 21,167.58-31,770.41-11,315.28

Finding the Fourth Proportional to 21,167.58, 31,770.41 and 11,315.28

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Solution

The fourth proportional to 21,167.58, 31,770.41 and 11,315.28 is: 16,983.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,167.58 : 31,770.41 = 11,315.28 : x
  2. Step 2: Convert to fraction form
    21,167.58/31,770.41 = 11,315.28/x
  3. Step 3: Cross multiply
    21,167.58x = 31,770.41 × 11,315.28
  4. Step 4: Simplify right side
    21,167.58x = 359,491,028.29
  5. Step 5: Solve for x
    x = 359,491,028.29/21,167.58
  6. Step 6: Final answer
    x = 16,983.10

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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.