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Finding the Fourth Proportional to 10,659.79, 15,995.09 and 7,189.75

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Solution

The fourth proportional to 10,659.79, 15,995.09 and 7,189.75 is: 10,788.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,659.79 : 15,995.09 = 7,189.75 : x
  2. Step 2: Convert to fraction form
    10,659.79/15,995.09 = 7,189.75/x
  3. Step 3: Cross multiply
    10,659.79x = 15,995.09 × 7,189.75
  4. Step 4: Simplify right side
    10,659.79x = 115,000,662.38
  5. Step 5: Solve for x
    x = 115,000,662.38/10,659.79
  6. Step 6: Final answer
    x = 10,788.27

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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.