Home / 38,512.88-53,142.51-21,515.03

Finding the Fourth Proportional to 38,512.88, 53,142.51 and 21,515.03

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Solution

The fourth proportional to 38,512.88, 53,142.51 and 21,515.03 is: 29,687.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,512.88 : 53,142.51 = 21,515.03 : x
  2. Step 2: Convert to fraction form
    38,512.88/53,142.51 = 21,515.03/x
  3. Step 3: Cross multiply
    38,512.88x = 53,142.51 × 21,515.03
  4. Step 4: Simplify right side
    38,512.88x = 1,143,363,010.11
  5. Step 5: Solve for x
    x = 1,143,363,010.11/38,512.88
  6. Step 6: Final answer
    x = 29,687.81

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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.