Home / 39,392.85-54,382.20-30,420.21

Finding the Fourth Proportional to 39,392.85, 54,382.20 and 30,420.21

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Solution

The fourth proportional to 39,392.85, 54,382.20 and 30,420.21 is: 41,995.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,392.85 : 54,382.20 = 30,420.21 : x
  2. Step 2: Convert to fraction form
    39,392.85/54,382.20 = 30,420.21/x
  3. Step 3: Cross multiply
    39,392.85x = 54,382.20 × 30,420.21
  4. Step 4: Simplify right side
    39,392.85x = 1,654,317,672.35
  5. Step 5: Solve for x
    x = 1,654,317,672.35/39,392.85
  6. Step 6: Final answer
    x = 41,995.38

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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.