Home / 13,853.10-20,779.65-3,992.40

Finding the Fourth Proportional to 13,853.10, 20,779.65 and 3,992.40

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Solution

The fourth proportional to 13,853.10, 20,779.65 and 3,992.40 is: 5,988.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,853.10 : 20,779.65 = 3,992.40 : x
  2. Step 2: Convert to fraction form
    13,853.10/20,779.65 = 3,992.40/x
  3. Step 3: Cross multiply
    13,853.10x = 20,779.65 × 3,992.40
  4. Step 4: Simplify right side
    13,853.10x = 82,960,674.66
  5. Step 5: Solve for x
    x = 82,960,674.66/13,853.10
  6. Step 6: Final answer
    x = 5,988.60

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Similar ratio
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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.