Home / 20,915.88-28,853.22-13,354.26

Finding the Fourth Proportional to 20,915.88, 28,853.22 and 13,354.26

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Solution

The fourth proportional to 20,915.88, 28,853.22 and 13,354.26 is: 18,422.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,915.88 : 28,853.22 = 13,354.26 : x
  2. Step 2: Convert to fraction form
    20,915.88/28,853.22 = 13,354.26/x
  3. Step 3: Cross multiply
    20,915.88x = 28,853.22 × 13,354.26
  4. Step 4: Simplify right side
    20,915.88x = 385,313,401.72
  5. Step 5: Solve for x
    x = 385,313,401.72/20,915.88
  6. Step 6: Final answer
    x = 18,422.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.