Home / 13,985.90-20,973.96-4,122.56

Finding the Fourth Proportional to 13,985.90, 20,973.96 and 4,122.56

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Solution

The fourth proportional to 13,985.90, 20,973.96 and 4,122.56 is: 6,182.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,985.90 : 20,973.96 = 4,122.56 : x
  2. Step 2: Convert to fraction form
    13,985.90/20,973.96 = 4,122.56/x
  3. Step 3: Cross multiply
    13,985.90x = 20,973.96 × 4,122.56
  4. Step 4: Simplify right side
    13,985.90x = 86,466,408.54
  5. Step 5: Solve for x
    x = 86,466,408.54/13,985.90
  6. Step 6: Final answer
    x = 6,182.40

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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.