Home / 21,116.40-29,140.26-12,163.88

Finding the Fourth Proportional to 21,116.40, 29,140.26 and 12,163.88

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Solution

The fourth proportional to 21,116.40, 29,140.26 and 12,163.88 is: 16,785.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,116.40 : 29,140.26 = 12,163.88 : x
  2. Step 2: Convert to fraction form
    21,116.40/29,140.26 = 12,163.88/x
  3. Step 3: Cross multiply
    21,116.40x = 29,140.26 × 12,163.88
  4. Step 4: Simplify right side
    21,116.40x = 354,458,480.11
  5. Step 5: Solve for x
    x = 354,458,480.11/21,116.40
  6. Step 6: Final answer
    x = 16,785.93

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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.