Home / 11,090.30-16,643.55-7,809.80

Finding the Fourth Proportional to 11,090.30, 16,643.55 and 7,809.80

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Solution

The fourth proportional to 11,090.30, 16,643.55 and 7,809.80 is: 11,720.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,090.30 : 16,643.55 = 7,809.80 : x
  2. Step 2: Convert to fraction form
    11,090.30/16,643.55 = 7,809.80/x
  3. Step 3: Cross multiply
    11,090.30x = 16,643.55 × 7,809.80
  4. Step 4: Simplify right side
    11,090.30x = 129,982,796.79
  5. Step 5: Solve for x
    x = 129,982,796.79/11,090.30
  6. Step 6: Final answer
    x = 11,720.40

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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.