Home / 12,212.10-18,316.95-3,890.64

Finding the Fourth Proportional to 12,212.10, 18,316.95 and 3,890.64

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Solution

The fourth proportional to 12,212.10, 18,316.95 and 3,890.64 is: 5,835.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,212.10 : 18,316.95 = 3,890.64 : x
  2. Step 2: Convert to fraction form
    12,212.10/18,316.95 = 3,890.64/x
  3. Step 3: Cross multiply
    12,212.10x = 18,316.95 × 3,890.64
  4. Step 4: Simplify right side
    12,212.10x = 71,264,658.35
  5. Step 5: Solve for x
    x = 71,264,658.35/12,212.10
  6. Step 6: Final answer
    x = 5,835.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.