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Finding the Fourth Proportional to 13,384.91, 18,479.84 and 8,607

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Solution

The fourth proportional to 13,384.91, 18,479.84 and 8,607 is: 11,883.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,384.91 : 18,479.84 = 8,607 : x
  2. Step 2: Convert to fraction form
    13,384.91/18,479.84 = 8,607/x
  3. Step 3: Cross multiply
    13,384.91x = 18,479.84 × 8,607
  4. Step 4: Simplify right side
    13,384.91x = 159,055,982.88
  5. Step 5: Solve for x
    x = 159,055,982.88/13,384.91
  6. Step 6: Final answer
    x = 11,883.23

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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.