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Finding the Fourth Proportional to 13,384.63, 18,479.81 and 11,963.77

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Solution

The fourth proportional to 13,384.63, 18,479.81 and 11,963.77 is: 16,518.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,384.63 : 18,479.81 = 11,963.77 : x
  2. Step 2: Convert to fraction form
    13,384.63/18,479.81 = 11,963.77/x
  3. Step 3: Cross multiply
    13,384.63x = 18,479.81 × 11,963.77
  4. Step 4: Simplify right side
    13,384.63x = 221,088,180.19
  5. Step 5: Solve for x
    x = 221,088,180.19/13,384.63
  6. Step 6: Final answer
    x = 16,518.06

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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.