Home / 20,645.37-30,915.45-13,604.04

Finding the Fourth Proportional to 20,645.37, 30,915.45 and 13,604.04

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Solution

The fourth proportional to 20,645.37, 30,915.45 and 13,604.04 is: 20,371.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,645.37 : 30,915.45 = 13,604.04 : x
  2. Step 2: Convert to fraction form
    20,645.37/30,915.45 = 13,604.04/x
  3. Step 3: Cross multiply
    20,645.37x = 30,915.45 × 13,604.04
  4. Step 4: Simplify right side
    20,645.37x = 420,575,018.42
  5. Step 5: Solve for x
    x = 420,575,018.42/20,645.37
  6. Step 6: Final answer
    x = 20,371.40

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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.