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Finding the Fourth Proportional to 57,986.05, 86,988.53 and 20,538.01

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Solution

The fourth proportional to 57,986.05, 86,988.53 and 20,538.01 is: 30,810.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,986.05 : 86,988.53 = 20,538.01 : x
  2. Step 2: Convert to fraction form
    57,986.05/86,988.53 = 20,538.01/x
  3. Step 3: Cross multiply
    57,986.05x = 86,988.53 × 20,538.01
  4. Step 4: Simplify right side
    57,986.05x = 1,786,570,969.80
  5. Step 5: Solve for x
    x = 1,786,570,969.80/57,986.05
  6. Step 6: Final answer
    x = 30,810.36

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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.