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Finding the Fourth Proportional to 38,477.80, 57,732.90 and 20,960.20

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Solution

The fourth proportional to 38,477.80, 57,732.90 and 20,960.20 is: 31,449.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,477.80 : 57,732.90 = 20,960.20 : x
  2. Step 2: Convert to fraction form
    38,477.80/57,732.90 = 20,960.20/x
  3. Step 3: Cross multiply
    38,477.80x = 57,732.90 × 20,960.20
  4. Step 4: Simplify right side
    38,477.80x = 1,210,093,130.58
  5. Step 5: Solve for x
    x = 1,210,093,130.58/38,477.80
  6. Step 6: Final answer
    x = 31,449.12

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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.