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Finding the Fourth Proportional to 30,801.40, 46,202.10 and 20,959.90

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Solution

The fourth proportional to 30,801.40, 46,202.10 and 20,959.90 is: 31,439.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,801.40 : 46,202.10 = 20,959.90 : x
  2. Step 2: Convert to fraction form
    30,801.40/46,202.10 = 20,959.90/x
  3. Step 3: Cross multiply
    30,801.40x = 46,202.10 × 20,959.90
  4. Step 4: Simplify right side
    30,801.40x = 968,391,395.79
  5. Step 5: Solve for x
    x = 968,391,395.79/30,801.40
  6. Step 6: Final answer
    x = 31,439.85

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1.5x scale

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.