Home / 20,139.84-30,218.40-11,361.60

Finding the Fourth Proportional to 20,139.84, 30,218.40 and 11,361.60

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Solution

The fourth proportional to 20,139.84, 30,218.40 and 11,361.60 is: 17,047.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,139.84 : 30,218.40 = 11,361.60 : x
  2. Step 2: Convert to fraction form
    20,139.84/30,218.40 = 11,361.60/x
  3. Step 3: Cross multiply
    20,139.84x = 30,218.40 × 11,361.60
  4. Step 4: Simplify right side
    20,139.84x = 343,329,373.44
  5. Step 5: Solve for x
    x = 343,329,373.44/20,139.84
  6. Step 6: Final answer
    x = 17,047.27

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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.