Home / 13,988.75-20,986.96-4,128.02

Finding the Fourth Proportional to 13,988.75, 20,986.96 and 4,128.02

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Solution

The fourth proportional to 13,988.75, 20,986.96 and 4,128.02 is: 6,193.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,988.75 : 20,986.96 = 4,128.02 : x
  2. Step 2: Convert to fraction form
    13,988.75/20,986.96 = 4,128.02/x
  3. Step 3: Cross multiply
    13,988.75x = 20,986.96 × 4,128.02
  4. Step 4: Simplify right side
    13,988.75x = 86,634,620.83
  5. Step 5: Solve for x
    x = 86,634,620.83/13,988.75
  6. Step 6: Final answer
    x = 6,193.17

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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.