Home / 20,395.80-28,146.18-11,903.76

Finding the Fourth Proportional to 20,395.80, 28,146.18 and 11,903.76

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Solution

The fourth proportional to 20,395.80, 28,146.18 and 11,903.76 is: 16,427.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,395.80 : 28,146.18 = 11,903.76 : x
  2. Step 2: Convert to fraction form
    20,395.80/28,146.18 = 11,903.76/x
  3. Step 3: Cross multiply
    20,395.80x = 28,146.18 × 11,903.76
  4. Step 4: Simplify right side
    20,395.80x = 335,045,371.64
  5. Step 5: Solve for x
    x = 335,045,371.64/20,395.80
  6. Step 6: Final answer
    x = 16,427.17

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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.