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Finding the Fourth Proportional to 12,669.71, 17,479.92 and 8,199.11

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Solution

The fourth proportional to 12,669.71, 17,479.92 and 8,199.11 is: 11,312.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,669.71 : 17,479.92 = 8,199.11 : x
  2. Step 2: Convert to fraction form
    12,669.71/17,479.92 = 8,199.11/x
  3. Step 3: Cross multiply
    12,669.71x = 17,479.92 × 8,199.11
  4. Step 4: Simplify right side
    12,669.71x = 143,319,786.87
  5. Step 5: Solve for x
    x = 143,319,786.87/12,669.71
  6. Step 6: Final answer
    x = 11,312.00

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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.