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Finding the Fourth Proportional to 18,643.94, 27,959.95 and 6,161.63

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Solution

The fourth proportional to 18,643.94, 27,959.95 and 6,161.63 is: 9,240.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,643.94 : 27,959.95 = 6,161.63 : x
  2. Step 2: Convert to fraction form
    18,643.94/27,959.95 = 6,161.63/x
  3. Step 3: Cross multiply
    18,643.94x = 27,959.95 × 6,161.63
  4. Step 4: Simplify right side
    18,643.94x = 172,278,835.91
  5. Step 5: Solve for x
    x = 172,278,835.91/18,643.94
  6. Step 6: Final answer
    x = 9,240.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.