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Finding the Fourth Proportional to 39,847.68, 54,978.48 and 25,708.80

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Solution

The fourth proportional to 39,847.68, 54,978.48 and 25,708.80 is: 35,470.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,847.68 : 54,978.48 = 25,708.80 : x
  2. Step 2: Convert to fraction form
    39,847.68/54,978.48 = 25,708.80/x
  3. Step 3: Cross multiply
    39,847.68x = 54,978.48 × 25,708.80
  4. Step 4: Simplify right side
    39,847.68x = 1,413,430,746.62
  5. Step 5: Solve for x
    x = 1,413,430,746.62/39,847.68
  6. Step 6: Final answer
    x = 35,470.84

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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.