Home / 20,759.81-28,648.64-11,328.57

Finding the Fourth Proportional to 20,759.81, 28,648.64 and 11,328.57

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Solution

The fourth proportional to 20,759.81, 28,648.64 and 11,328.57 is: 15,633.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,759.81 : 28,648.64 = 11,328.57 : x
  2. Step 2: Convert to fraction form
    20,759.81/28,648.64 = 11,328.57/x
  3. Step 3: Cross multiply
    20,759.81x = 28,648.64 × 11,328.57
  4. Step 4: Simplify right side
    20,759.81x = 324,548,151.97
  5. Step 5: Solve for x
    x = 324,548,151.97/20,759.81
  6. Step 6: Final answer
    x = 15,633.49

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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.