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Finding the Fourth Proportional to 39,477.28, 54,479.72 and 21,573.28

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Solution

The fourth proportional to 39,477.28, 54,479.72 and 21,573.28 is: 29,771.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,477.28 : 54,479.72 = 21,573.28 : x
  2. Step 2: Convert to fraction form
    39,477.28/54,479.72 = 21,573.28/x
  3. Step 3: Cross multiply
    39,477.28x = 54,479.72 × 21,573.28
  4. Step 4: Simplify right side
    39,477.28x = 1,175,306,253.88
  5. Step 5: Solve for x
    x = 1,175,306,253.88/39,477.28
  6. Step 6: Final answer
    x = 29,771.71

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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.