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Finding the Fourth Proportional to 14,918.32, 20,586.74 and 8,203.90

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Solution

The fourth proportional to 14,918.32, 20,586.74 and 8,203.90 is: 11,321.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,918.32 : 20,586.74 = 8,203.90 : x
  2. Step 2: Convert to fraction form
    14,918.32/20,586.74 = 8,203.90/x
  3. Step 3: Cross multiply
    14,918.32x = 20,586.74 × 8,203.90
  4. Step 4: Simplify right side
    14,918.32x = 168,891,556.29
  5. Step 5: Solve for x
    x = 168,891,556.29/14,918.32
  6. Step 6: Final answer
    x = 11,321.08

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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.