Home / 12,128.76-18,280.26-11,450.66

Finding the Fourth Proportional to 12,128.76, 18,280.26 and 11,450.66

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Solution

The fourth proportional to 12,128.76, 18,280.26 and 11,450.66 is: 17,258.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,128.76 : 18,280.26 = 11,450.66 : x
  2. Step 2: Convert to fraction form
    12,128.76/18,280.26 = 11,450.66/x
  3. Step 3: Cross multiply
    12,128.76x = 18,280.26 × 11,450.66
  4. Step 4: Simplify right side
    12,128.76x = 209,320,950.57
  5. Step 5: Solve for x
    x = 209,320,950.57/12,128.76
  6. Step 6: Final answer
    x = 17,258.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.