Home / 39,142.88-54,015.59-21,237.20

Finding the Fourth Proportional to 39,142.88, 54,015.59 and 21,237.20

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Solution

The fourth proportional to 39,142.88, 54,015.59 and 21,237.20 is: 29,306.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,142.88 : 54,015.59 = 21,237.20 : x
  2. Step 2: Convert to fraction form
    39,142.88/54,015.59 = 21,237.20/x
  3. Step 3: Cross multiply
    39,142.88x = 54,015.59 × 21,237.20
  4. Step 4: Simplify right side
    39,142.88x = 1,147,139,617.87
  5. Step 5: Solve for x
    x = 1,147,139,617.87/39,142.88
  6. Step 6: Final answer
    x = 29,306.47

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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.