Home / 15,493.40-21,380.96-8,419.82

Finding the Fourth Proportional to 15,493.40, 21,380.96 and 8,419.82

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Solution

The fourth proportional to 15,493.40, 21,380.96 and 8,419.82 is: 11,619.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,493.40 : 21,380.96 = 8,419.82 : x
  2. Step 2: Convert to fraction form
    15,493.40/21,380.96 = 8,419.82/x
  3. Step 3: Cross multiply
    15,493.40x = 21,380.96 × 8,419.82
  4. Step 4: Simplify right side
    15,493.40x = 180,023,792.53
  5. Step 5: Solve for x
    x = 180,023,792.53/15,493.40
  6. Step 6: Final answer
    x = 11,619.39

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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.