Home / 13,845.80-20,771.88-3,985.16

Finding the Fourth Proportional to 13,845.80, 20,771.88 and 3,985.16

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Solution

The fourth proportional to 13,845.80, 20,771.88 and 3,985.16 is: 5,978.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,845.80 : 20,771.88 = 3,985.16 : x
  2. Step 2: Convert to fraction form
    13,845.80/20,771.88 = 3,985.16/x
  3. Step 3: Cross multiply
    13,845.80x = 20,771.88 × 3,985.16
  4. Step 4: Simplify right side
    13,845.80x = 82,779,265.30
  5. Step 5: Solve for x
    x = 82,779,265.30/13,845.80
  6. Step 6: Final answer
    x = 5,978.66

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1.5x scale

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.