Home / 39,140.25-54,013.70-21,235.39

Finding the Fourth Proportional to 39,140.25, 54,013.70 and 21,235.39

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Solution

The fourth proportional to 39,140.25, 54,013.70 and 21,235.39 is: 29,304.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,140.25 : 54,013.70 = 21,235.39 : x
  2. Step 2: Convert to fraction form
    39,140.25/54,013.70 = 21,235.39/x
  3. Step 3: Cross multiply
    39,140.25x = 54,013.70 × 21,235.39
  4. Step 4: Simplify right side
    39,140.25x = 1,147,001,984.84
  5. Step 5: Solve for x
    x = 1,147,001,984.84/39,140.25
  6. Step 6: Final answer
    x = 29,304.92

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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.