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Finding the Fourth Proportional to 39,439.92, 59,160.80 and 13,146.80

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Solution

The fourth proportional to 39,439.92, 59,160.80 and 13,146.80 is: 19,720.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,439.92 : 59,160.80 = 13,146.80 : x
  2. Step 2: Convert to fraction form
    39,439.92/59,160.80 = 13,146.80/x
  3. Step 3: Cross multiply
    39,439.92x = 59,160.80 × 13,146.80
  4. Step 4: Simplify right side
    39,439.92x = 777,775,205.44
  5. Step 5: Solve for x
    x = 777,775,205.44/39,439.92
  6. Step 6: Final answer
    x = 19,720.51

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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.