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Finding the Fourth Proportional to 41,991, 57,995.64 and 28,539.60

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Solution

The fourth proportional to 41,991, 57,995.64 and 28,539.60 is: 39,417.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    41,991 : 57,995.64 = 28,539.60 : x
  2. Step 2: Convert to fraction form
    41,991/57,995.64 = 28,539.60/x
  3. Step 3: Cross multiply
    41,991x = 57,995.64 × 28,539.60
  4. Step 4: Simplify right side
    41,991x = 1,655,172,367.34
  5. Step 5: Solve for x
    x = 1,655,172,367.34/41,991
  6. Step 6: Final answer
    x = 39,417.31

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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.