Home / 39,681.42-54,760.20-21,776.72

Finding the Fourth Proportional to 39,681.42, 54,760.20 and 21,776.72

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Solution

The fourth proportional to 39,681.42, 54,760.20 and 21,776.72 is: 30,051.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,681.42 : 54,760.20 = 21,776.72 : x
  2. Step 2: Convert to fraction form
    39,681.42/54,760.20 = 21,776.72/x
  3. Step 3: Cross multiply
    39,681.42x = 54,760.20 × 21,776.72
  4. Step 4: Simplify right side
    39,681.42x = 1,192,497,542.54
  5. Step 5: Solve for x
    x = 1,192,497,542.54/39,681.42
  6. Step 6: Final answer
    x = 30,051.79

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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.