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Finding the Fourth Proportional to 12,608.60, 17,407.32 and 11,207.30

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Solution

The fourth proportional to 12,608.60, 17,407.32 and 11,207.30 is: 15,472.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,608.60 : 17,407.32 = 11,207.30 : x
  2. Step 2: Convert to fraction form
    12,608.60/17,407.32 = 11,207.30/x
  3. Step 3: Cross multiply
    12,608.60x = 17,407.32 × 11,207.30
  4. Step 4: Simplify right side
    12,608.60x = 195,089,057.44
  5. Step 5: Solve for x
    x = 195,089,057.44/12,608.60
  6. Step 6: Final answer
    x = 15,472.70

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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.