Home / 13,575.40-20,355.72-4,212.88

Finding the Fourth Proportional to 13,575.40, 20,355.72 and 4,212.88

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Solution

The fourth proportional to 13,575.40, 20,355.72 and 4,212.88 is: 6,317.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,575.40 : 20,355.72 = 4,212.88 : x
  2. Step 2: Convert to fraction form
    13,575.40/20,355.72 = 4,212.88/x
  3. Step 3: Cross multiply
    13,575.40x = 20,355.72 × 4,212.88
  4. Step 4: Simplify right side
    13,575.40x = 85,756,205.67
  5. Step 5: Solve for x
    x = 85,756,205.67/13,575.40
  6. Step 6: Final answer
    x = 6,317.03

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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.