Home / 13,690.55-18,893.60-7,722.09

Finding the Fourth Proportional to 13,690.55, 18,893.60 and 7,722.09

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Solution

The fourth proportional to 13,690.55, 18,893.60 and 7,722.09 is: 10,656.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,690.55 : 18,893.60 = 7,722.09 : x
  2. Step 2: Convert to fraction form
    13,690.55/18,893.60 = 7,722.09/x
  3. Step 3: Cross multiply
    13,690.55x = 18,893.60 × 7,722.09
  4. Step 4: Simplify right side
    13,690.55x = 145,898,079.62
  5. Step 5: Solve for x
    x = 145,898,079.62/13,690.55
  6. Step 6: Final answer
    x = 10,656.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.