Home / 28,491.36-39,317.76-15,744.56

Finding the Fourth Proportional to 28,491.36, 39,317.76 and 15,744.56

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Solution

The fourth proportional to 28,491.36, 39,317.76 and 15,744.56 is: 21,727.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,491.36 : 39,317.76 = 15,744.56 : x
  2. Step 2: Convert to fraction form
    28,491.36/39,317.76 = 15,744.56/x
  3. Step 3: Cross multiply
    28,491.36x = 39,317.76 × 15,744.56
  4. Step 4: Simplify right side
    28,491.36x = 619,040,831.39
  5. Step 5: Solve for x
    x = 619,040,831.39/28,491.36
  6. Step 6: Final answer
    x = 21,727.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.