Home / 28,759.43-39,685.22-21,209.82

Finding the Fourth Proportional to 28,759.43, 39,685.22 and 21,209.82

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Solution

The fourth proportional to 28,759.43, 39,685.22 and 21,209.82 is: 29,267.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,759.43 : 39,685.22 = 21,209.82 : x
  2. Step 2: Convert to fraction form
    28,759.43/39,685.22 = 21,209.82/x
  3. Step 3: Cross multiply
    28,759.43x = 39,685.22 × 21,209.82
  4. Step 4: Simplify right side
    28,759.43x = 841,716,372.86
  5. Step 5: Solve for x
    x = 841,716,372.86/28,759.43
  6. Step 6: Final answer
    x = 29,267.49

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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.