Home / 15,609.78-21,516.21-12,200.85

Finding the Fourth Proportional to 15,609.78, 21,516.21 and 12,200.85

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Solution

The fourth proportional to 15,609.78, 21,516.21 and 12,200.85 is: 16,817.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,609.78 : 21,516.21 = 12,200.85 : x
  2. Step 2: Convert to fraction form
    15,609.78/21,516.21 = 12,200.85/x
  3. Step 3: Cross multiply
    15,609.78x = 21,516.21 × 12,200.85
  4. Step 4: Simplify right side
    15,609.78x = 262,516,050.78
  5. Step 5: Solve for x
    x = 262,516,050.78/15,609.78
  6. Step 6: Final answer
    x = 16,817.41

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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.