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Finding the Fourth Proportional to 13,203.66, 18,221.05 and 7,614.66

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Solution

The fourth proportional to 13,203.66, 18,221.05 and 7,614.66 is: 10,508.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,203.66 : 18,221.05 = 7,614.66 : x
  2. Step 2: Convert to fraction form
    13,203.66/18,221.05 = 7,614.66/x
  3. Step 3: Cross multiply
    13,203.66x = 18,221.05 × 7,614.66
  4. Step 4: Simplify right side
    13,203.66x = 138,746,998.95
  5. Step 5: Solve for x
    x = 138,746,998.95/13,203.66
  6. Step 6: Final answer
    x = 10,508.23

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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.