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Finding the Fourth Proportional to 15,908.31, 21,953.97 and 8,835.30

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Solution

The fourth proportional to 15,908.31, 21,953.97 and 8,835.30 is: 12,192.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,908.31 : 21,953.97 = 8,835.30 : x
  2. Step 2: Convert to fraction form
    15,908.31/21,953.97 = 8,835.30/x
  3. Step 3: Cross multiply
    15,908.31x = 21,953.97 × 8,835.30
  4. Step 4: Simplify right side
    15,908.31x = 193,969,911.14
  5. Step 5: Solve for x
    x = 193,969,911.14/15,908.31
  6. Step 6: Final answer
    x = 12,192.99

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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.