Home / 20,123.88-30,185.80-13,196.76

Finding the Fourth Proportional to 20,123.88, 30,185.80 and 13,196.76

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Solution

The fourth proportional to 20,123.88, 30,185.80 and 13,196.76 is: 19,795.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,123.88 : 30,185.80 = 13,196.76 : x
  2. Step 2: Convert to fraction form
    20,123.88/30,185.80 = 13,196.76/x
  3. Step 3: Cross multiply
    20,123.88x = 30,185.80 × 13,196.76
  4. Step 4: Simplify right side
    20,123.88x = 398,354,758.01
  5. Step 5: Solve for x
    x = 398,354,758.01/20,123.88
  6. Step 6: Final answer
    x = 19,795.13

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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.