Home / 39,425.47-54,406.29-21,520.78

Finding the Fourth Proportional to 39,425.47, 54,406.29 and 21,520.78

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Solution

The fourth proportional to 39,425.47, 54,406.29 and 21,520.78 is: 29,698.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,425.47 : 54,406.29 = 21,520.78 : x
  2. Step 2: Convert to fraction form
    39,425.47/54,406.29 = 21,520.78/x
  3. Step 3: Cross multiply
    39,425.47x = 54,406.29 × 21,520.78
  4. Step 4: Simplify right side
    39,425.47x = 1,170,865,797.71
  5. Step 5: Solve for x
    x = 1,170,865,797.71/39,425.47
  6. Step 6: Final answer
    x = 29,698.21

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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.