Home / 15,521.58-21,419.37-8,447.85

Finding the Fourth Proportional to 15,521.58, 21,419.37 and 8,447.85

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Solution

The fourth proportional to 15,521.58, 21,419.37 and 8,447.85 is: 11,657.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,521.58 : 21,419.37 = 8,447.85 : x
  2. Step 2: Convert to fraction form
    15,521.58/21,419.37 = 8,447.85/x
  3. Step 3: Cross multiply
    15,521.58x = 21,419.37 × 8,447.85
  4. Step 4: Simplify right side
    15,521.58x = 180,947,624.85
  5. Step 5: Solve for x
    x = 180,947,624.85/15,521.58
  6. Step 6: Final answer
    x = 11,657.81

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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.