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Finding the Fourth Proportional to 13,478.60, 18,594.17 and 8,697.31

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Solution

The fourth proportional to 13,478.60, 18,594.17 and 8,697.31 is: 11,998.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,478.60 : 18,594.17 = 8,697.31 : x
  2. Step 2: Convert to fraction form
    13,478.60/18,594.17 = 8,697.31/x
  3. Step 3: Cross multiply
    13,478.60x = 18,594.17 × 8,697.31
  4. Step 4: Simplify right side
    13,478.60x = 161,719,203.33
  5. Step 5: Solve for x
    x = 161,719,203.33/13,478.60
  6. Step 6: Final answer
    x = 11,998.22

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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.