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Finding the Fourth Proportional to 15,347.28, 21,179.92 and 8,633.28

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Solution

The fourth proportional to 15,347.28, 21,179.92 and 8,633.28 is: 11,914.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,347.28 : 21,179.92 = 8,633.28 : x
  2. Step 2: Convert to fraction form
    15,347.28/21,179.92 = 8,633.28/x
  3. Step 3: Cross multiply
    15,347.28x = 21,179.92 × 8,633.28
  4. Step 4: Simplify right side
    15,347.28x = 182,852,179.74
  5. Step 5: Solve for x
    x = 182,852,179.74/15,347.28
  6. Step 6: Final answer
    x = 11,914.31

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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.