Home / 20,270.97-30,409.70-7,123.77

Finding the Fourth Proportional to 20,270.97, 30,409.70 and 7,123.77

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Solution

The fourth proportional to 20,270.97, 30,409.70 and 7,123.77 is: 10,686.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,270.97 : 30,409.70 = 7,123.77 : x
  2. Step 2: Convert to fraction form
    20,270.97/30,409.70 = 7,123.77/x
  3. Step 3: Cross multiply
    20,270.97x = 30,409.70 × 7,123.77
  4. Step 4: Simplify right side
    20,270.97x = 216,631,672.95
  5. Step 5: Solve for x
    x = 216,631,672.95/20,270.97
  6. Step 6: Final answer
    x = 10,686.79

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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.