Home / 13,985.19-20,986.01-5,220.79

Finding the Fourth Proportional to 13,985.19, 20,986.01 and 5,220.79

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Solution

The fourth proportional to 13,985.19, 20,986.01 and 5,220.79 is: 7,834.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,985.19 : 20,986.01 = 5,220.79 : x
  2. Step 2: Convert to fraction form
    13,985.19/20,986.01 = 5,220.79/x
  3. Step 3: Cross multiply
    13,985.19x = 20,986.01 × 5,220.79
  4. Step 4: Simplify right side
    13,985.19x = 109,563,525.04
  5. Step 5: Solve for x
    x = 109,563,525.04/13,985.19
  6. Step 6: Final answer
    x = 7,834.25

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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.