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Finding the Fourth Proportional to 15,670.88, 21,625.09 and 8,597.15

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Solution

The fourth proportional to 15,670.88, 21,625.09 and 8,597.15 is: 11,863.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,670.88 : 21,625.09 = 8,597.15 : x
  2. Step 2: Convert to fraction form
    15,670.88/21,625.09 = 8,597.15/x
  3. Step 3: Cross multiply
    15,670.88x = 21,625.09 × 8,597.15
  4. Step 4: Simplify right side
    15,670.88x = 185,914,142.49
  5. Step 5: Solve for x
    x = 185,914,142.49/15,670.88
  6. Step 6: Final answer
    x = 11,863.67

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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.