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Finding the Fourth Proportional to 57,431.66, 86,147.49 and 17,991.86

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Solution

The fourth proportional to 57,431.66, 86,147.49 and 17,991.86 is: 26,987.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,431.66 : 86,147.49 = 17,991.86 : x
  2. Step 2: Convert to fraction form
    57,431.66/86,147.49 = 17,991.86/x
  3. Step 3: Cross multiply
    57,431.66x = 86,147.49 × 17,991.86
  4. Step 4: Simplify right side
    57,431.66x = 1,549,953,579.43
  5. Step 5: Solve for x
    x = 1,549,953,579.43/57,431.66
  6. Step 6: Final answer
    x = 26,987.79

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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.