Home / 20,972.81-31,429.55-11,617.11

Finding the Fourth Proportional to 20,972.81, 31,429.55 and 11,617.11

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Solution

The fourth proportional to 20,972.81, 31,429.55 and 11,617.11 is: 17,409.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,972.81 : 31,429.55 = 11,617.11 : x
  2. Step 2: Convert to fraction form
    20,972.81/31,429.55 = 11,617.11/x
  3. Step 3: Cross multiply
    20,972.81x = 31,429.55 × 11,617.11
  4. Step 4: Simplify right side
    20,972.81x = 365,120,481.51
  5. Step 5: Solve for x
    x = 365,120,481.51/20,972.81
  6. Step 6: Final answer
    x = 17,409.23

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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.