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Finding the Fourth Proportional to 47,305.72, 70,974.90 and 21,028.84

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Solution

The fourth proportional to 47,305.72, 70,974.90 and 21,028.84 is: 31,550.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,305.72 : 70,974.90 = 21,028.84 : x
  2. Step 2: Convert to fraction form
    47,305.72/70,974.90 = 21,028.84/x
  3. Step 3: Cross multiply
    47,305.72x = 70,974.90 × 21,028.84
  4. Step 4: Simplify right side
    47,305.72x = 1,492,519,816.12
  5. Step 5: Solve for x
    x = 1,492,519,816.12/47,305.72
  6. Step 6: Final answer
    x = 31,550.51

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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.