Home / 13,689.18-20,434.75-12,028.43

Finding the Fourth Proportional to 13,689.18, 20,434.75 and 12,028.43

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Solution

The fourth proportional to 13,689.18, 20,434.75 and 12,028.43 is: 17,955.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,689.18 : 20,434.75 = 12,028.43 : x
  2. Step 2: Convert to fraction form
    13,689.18/20,434.75 = 12,028.43/x
  3. Step 3: Cross multiply
    13,689.18x = 20,434.75 × 12,028.43
  4. Step 4: Simplify right side
    13,689.18x = 245,797,899.80
  5. Step 5: Solve for x
    x = 245,797,899.80/13,689.18
  6. Step 6: Final answer
    x = 17,955.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.