Home / 28,321.89-39,026.54-21,909.52

Finding the Fourth Proportional to 28,321.89, 39,026.54 and 21,909.52

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Solution

The fourth proportional to 28,321.89, 39,026.54 and 21,909.52 is: 30,190.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,321.89 : 39,026.54 = 21,909.52 : x
  2. Step 2: Convert to fraction form
    28,321.89/39,026.54 = 21,909.52/x
  3. Step 3: Cross multiply
    28,321.89x = 39,026.54 × 21,909.52
  4. Step 4: Simplify right side
    28,321.89x = 855,052,862.22
  5. Step 5: Solve for x
    x = 855,052,862.22/28,321.89
  6. Step 6: Final answer
    x = 30,190.53

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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.