Home / 20,288.96-30,436.32-7,139.84

Finding the Fourth Proportional to 20,288.96, 30,436.32 and 7,139.84

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Solution

The fourth proportional to 20,288.96, 30,436.32 and 7,139.84 is: 10,710.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,288.96 : 30,436.32 = 7,139.84 : x
  2. Step 2: Convert to fraction form
    20,288.96/30,436.32 = 7,139.84/x
  3. Step 3: Cross multiply
    20,288.96x = 30,436.32 × 7,139.84
  4. Step 4: Simplify right side
    20,288.96x = 217,310,454.99
  5. Step 5: Solve for x
    x = 217,310,454.99/20,288.96
  6. Step 6: Final answer
    x = 10,710.77

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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.