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Finding the Fourth Proportional to 39,856.80, 59,785.20 and 13,552.80

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Solution

The fourth proportional to 39,856.80, 59,785.20 and 13,552.80 is: 20,329.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,856.80 : 59,785.20 = 13,552.80 : x
  2. Step 2: Convert to fraction form
    39,856.80/59,785.20 = 13,552.80/x
  3. Step 3: Cross multiply
    39,856.80x = 59,785.20 × 13,552.80
  4. Step 4: Simplify right side
    39,856.80x = 810,256,858.56
  5. Step 5: Solve for x
    x = 810,256,858.56/39,856.80
  6. Step 6: Final answer
    x = 20,329.20

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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.