Home / 15,425.39-21,286.24-8,618.20

Finding the Fourth Proportional to 15,425.39, 21,286.24 and 8,618.20

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Solution

The fourth proportional to 15,425.39, 21,286.24 and 8,618.20 is: 11,892.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,425.39 : 21,286.24 = 8,618.20 : x
  2. Step 2: Convert to fraction form
    15,425.39/21,286.24 = 8,618.20/x
  3. Step 3: Cross multiply
    15,425.39x = 21,286.24 × 8,618.20
  4. Step 4: Simplify right side
    15,425.39x = 183,449,047.28
  5. Step 5: Solve for x
    x = 183,449,047.28/15,425.39
  6. Step 6: Final answer
    x = 11,892.67

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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.