Home / 38,139.82-52,628.07-21,143.90

Finding the Fourth Proportional to 38,139.82, 52,628.07 and 21,143.90

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Solution

The fourth proportional to 38,139.82, 52,628.07 and 21,143.90 is: 29,175.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,139.82 : 52,628.07 = 21,143.90 : x
  2. Step 2: Convert to fraction form
    38,139.82/52,628.07 = 21,143.90/x
  3. Step 3: Cross multiply
    38,139.82x = 52,628.07 × 21,143.90
  4. Step 4: Simplify right side
    38,139.82x = 1,112,762,649.27
  5. Step 5: Solve for x
    x = 1,112,762,649.27/38,139.82
  6. Step 6: Final answer
    x = 29,175.88

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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.