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Finding the Fourth Proportional to 15,672.21, 21,628.13 and 8,599.11

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Solution

The fourth proportional to 15,672.21, 21,628.13 and 8,599.11 is: 11,867.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,672.21 : 21,628.13 = 8,599.11 : x
  2. Step 2: Convert to fraction form
    15,672.21/21,628.13 = 8,599.11/x
  3. Step 3: Cross multiply
    15,672.21x = 21,628.13 × 8,599.11
  4. Step 4: Simplify right side
    15,672.21x = 185,982,625.97
  5. Step 5: Solve for x
    x = 185,982,625.97/15,672.21
  6. Step 6: Final answer
    x = 11,867.03

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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.