Home / 13,986.02-20,972.54-5,218.58

Finding the Fourth Proportional to 13,986.02, 20,972.54 and 5,218.58

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Solution

The fourth proportional to 13,986.02, 20,972.54 and 5,218.58 is: 7,825.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,986.02 : 20,972.54 = 5,218.58 : x
  2. Step 2: Convert to fraction form
    13,986.02/20,972.54 = 5,218.58/x
  3. Step 3: Cross multiply
    13,986.02x = 20,972.54 × 5,218.58
  4. Step 4: Simplify right side
    13,986.02x = 109,446,877.79
  5. Step 5: Solve for x
    x = 109,446,877.79/13,986.02
  6. Step 6: Final answer
    x = 7,825.45

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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.