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Finding the Fourth Proportional to 11,459.60, 17,188.60 and 3,140.08

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Solution

The fourth proportional to 11,459.60, 17,188.60 and 3,140.08 is: 4,709.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,459.60 : 17,188.60 = 3,140.08 : x
  2. Step 2: Convert to fraction form
    11,459.60/17,188.60 = 3,140.08/x
  3. Step 3: Cross multiply
    11,459.60x = 17,188.60 × 3,140.08
  4. Step 4: Simplify right side
    11,459.60x = 53,973,579.09
  5. Step 5: Solve for x
    x = 53,973,579.09/11,459.60
  6. Step 6: Final answer
    x = 4,709.90

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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.