Home / 20,299.40-30,428.34-11,515.76

Finding the Fourth Proportional to 20,299.40, 30,428.34 and 11,515.76

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Solution

The fourth proportional to 20,299.40, 30,428.34 and 11,515.76 is: 17,261.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,299.40 : 30,428.34 = 11,515.76 : x
  2. Step 2: Convert to fraction form
    20,299.40/30,428.34 = 11,515.76/x
  3. Step 3: Cross multiply
    20,299.40x = 30,428.34 × 11,515.76
  4. Step 4: Simplify right side
    20,299.40x = 350,405,460.64
  5. Step 5: Solve for x
    x = 350,405,460.64/20,299.40
  6. Step 6: Final answer
    x = 17,261.86

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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.