Home / 39,824.20-59,640.30-21,315.40

Finding the Fourth Proportional to 39,824.20, 59,640.30 and 21,315.40

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Solution

The fourth proportional to 39,824.20, 59,640.30 and 21,315.40 is: 31,921.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,824.20 : 59,640.30 = 21,315.40 : x
  2. Step 2: Convert to fraction form
    39,824.20/59,640.30 = 21,315.40/x
  3. Step 3: Cross multiply
    39,824.20x = 59,640.30 × 21,315.40
  4. Step 4: Simplify right side
    39,824.20x = 1,271,256,850.62
  5. Step 5: Solve for x
    x = 1,271,256,850.62/39,824.20
  6. Step 6: Final answer
    x = 31,921.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.