Home / 13,090.72-18,065.04-8,620.96

Finding the Fourth Proportional to 13,090.72, 18,065.04 and 8,620.96

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Solution

The fourth proportional to 13,090.72, 18,065.04 and 8,620.96 is: 11,896.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,090.72 : 18,065.04 = 8,620.96 : x
  2. Step 2: Convert to fraction form
    13,090.72/18,065.04 = 8,620.96/x
  3. Step 3: Cross multiply
    13,090.72x = 18,065.04 × 8,620.96
  4. Step 4: Simplify right side
    13,090.72x = 155,737,987.24
  5. Step 5: Solve for x
    x = 155,737,987.24/13,090.72
  6. Step 6: Final answer
    x = 11,896.82

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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.