Home / 12,155.64-18,220.50-8,682.36

Finding the Fourth Proportional to 12,155.64, 18,220.50 and 8,682.36

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Solution

The fourth proportional to 12,155.64, 18,220.50 and 8,682.36 is: 13,014.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,155.64 : 18,220.50 = 8,682.36 : x
  2. Step 2: Convert to fraction form
    12,155.64/18,220.50 = 8,682.36/x
  3. Step 3: Cross multiply
    12,155.64x = 18,220.50 × 8,682.36
  4. Step 4: Simplify right side
    12,155.64x = 158,196,940.38
  5. Step 5: Solve for x
    x = 158,196,940.38/12,155.64
  6. Step 6: Final answer
    x = 13,014.28

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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.