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Finding the Fourth Proportional to 57,987.42, 86,986.43 and 18,006.63

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Solution

The fourth proportional to 57,987.42, 86,986.43 and 18,006.63 is: 27,011.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,987.42 : 86,986.43 = 18,006.63 : x
  2. Step 2: Convert to fraction form
    57,987.42/86,986.43 = 18,006.63/x
  3. Step 3: Cross multiply
    57,987.42x = 86,986.43 × 18,006.63
  4. Step 4: Simplify right side
    57,987.42x = 1,566,332,460.03
  5. Step 5: Solve for x
    x = 1,566,332,460.03/57,987.42
  6. Step 6: Final answer
    x = 27,011.59

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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.