Home / 15,711.58-21,683.21-8,999.37

Finding the Fourth Proportional to 15,711.58, 21,683.21 and 8,999.37

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Solution

The fourth proportional to 15,711.58, 21,683.21 and 8,999.37 is: 12,419.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,711.58 : 21,683.21 = 8,999.37 : x
  2. Step 2: Convert to fraction form
    15,711.58/21,683.21 = 8,999.37/x
  3. Step 3: Cross multiply
    15,711.58x = 21,683.21 × 8,999.37
  4. Step 4: Simplify right side
    15,711.58x = 195,135,229.58
  5. Step 5: Solve for x
    x = 195,135,229.58/15,711.58
  6. Step 6: Final answer
    x = 12,419.83

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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.