Home / 20,939.82-31,411.26-7,792.19

Finding the Fourth Proportional to 20,939.82, 31,411.26 and 7,792.19

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Solution

The fourth proportional to 20,939.82, 31,411.26 and 7,792.19 is: 11,688.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,939.82 : 31,411.26 = 7,792.19 : x
  2. Step 2: Convert to fraction form
    20,939.82/31,411.26 = 7,792.19/x
  3. Step 3: Cross multiply
    20,939.82x = 31,411.26 × 7,792.19
  4. Step 4: Simplify right side
    20,939.82x = 244,762,506.06
  5. Step 5: Solve for x
    x = 244,762,506.06/20,939.82
  6. Step 6: Final answer
    x = 11,688.85

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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.