Home / 20,780.34-31,174.58-7,632.81

Finding the Fourth Proportional to 20,780.34, 31,174.58 and 7,632.81

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Solution

The fourth proportional to 20,780.34, 31,174.58 and 7,632.81 is: 11,450.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,780.34 : 31,174.58 = 7,632.81 : x
  2. Step 2: Convert to fraction form
    20,780.34/31,174.58 = 7,632.81/x
  3. Step 3: Cross multiply
    20,780.34x = 31,174.58 × 7,632.81
  4. Step 4: Simplify right side
    20,780.34x = 237,949,607.81
  5. Step 5: Solve for x
    x = 237,949,607.81/20,780.34
  6. Step 6: Final answer
    x = 11,450.71

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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.