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Finding the Fourth Proportional to 39,591.92, 59,412 and 20,618.48

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Solution

The fourth proportional to 39,591.92, 59,412 and 20,618.48 is: 30,940.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,591.92 : 59,412 = 20,618.48 : x
  2. Step 2: Convert to fraction form
    39,591.92/59,412 = 20,618.48/x
  3. Step 3: Cross multiply
    39,591.92x = 59,412 × 20,618.48
  4. Step 4: Simplify right side
    39,591.92x = 1,224,985,133.76
  5. Step 5: Solve for x
    x = 1,224,985,133.76/39,591.92
  6. Step 6: Final answer
    x = 30,940.28

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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.