Home / 12,220.86-18,315.90-6,662.64

Finding the Fourth Proportional to 12,220.86, 18,315.90 and 6,662.64

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Solution

The fourth proportional to 12,220.86, 18,315.90 and 6,662.64 is: 9,985.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,220.86 : 18,315.90 = 6,662.64 : x
  2. Step 2: Convert to fraction form
    12,220.86/18,315.90 = 6,662.64/x
  3. Step 3: Cross multiply
    12,220.86x = 18,315.90 × 6,662.64
  4. Step 4: Simplify right side
    12,220.86x = 122,032,247.98
  5. Step 5: Solve for x
    x = 122,032,247.98/12,220.86
  6. Step 6: Final answer
    x = 9,985.57

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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.