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Finding the Fourth Proportional to 39,593.99, 54,639.72 and 21,689.64

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Solution

The fourth proportional to 39,593.99, 54,639.72 and 21,689.64 is: 29,931.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,593.99 : 54,639.72 = 21,689.64 : x
  2. Step 2: Convert to fraction form
    39,593.99/54,639.72 = 21,689.64/x
  3. Step 3: Cross multiply
    39,593.99x = 54,639.72 × 21,689.64
  4. Step 4: Simplify right side
    39,593.99x = 1,185,115,638.57
  5. Step 5: Solve for x
    x = 1,185,115,638.57/39,593.99
  6. Step 6: Final answer
    x = 29,931.71

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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.