Home / 20,812.48-31,219.68-11,571.52

Finding the Fourth Proportional to 20,812.48, 31,219.68 and 11,571.52

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Solution

The fourth proportional to 20,812.48, 31,219.68 and 11,571.52 is: 17,357.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,812.48 : 31,219.68 = 11,571.52 : x
  2. Step 2: Convert to fraction form
    20,812.48/31,219.68 = 11,571.52/x
  3. Step 3: Cross multiply
    20,812.48x = 31,219.68 × 11,571.52
  4. Step 4: Simplify right side
    20,812.48x = 361,259,151.51
  5. Step 5: Solve for x
    x = 361,259,151.51/20,812.48
  6. Step 6: Final answer
    x = 17,357.81

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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.