Home / 15,493.40-21,380.32-8,419.67

Finding the Fourth Proportional to 15,493.40, 21,380.32 and 8,419.67

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Solution

The fourth proportional to 15,493.40, 21,380.32 and 8,419.67 is: 11,618.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,493.40 : 21,380.32 = 8,419.67 : x
  2. Step 2: Convert to fraction form
    15,493.40/21,380.32 = 8,419.67/x
  3. Step 3: Cross multiply
    15,493.40x = 21,380.32 × 8,419.67
  4. Step 4: Simplify right side
    15,493.40x = 180,015,238.89
  5. Step 5: Solve for x
    x = 180,015,238.89/15,493.40
  6. Step 6: Final answer
    x = 11,618.83

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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.