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Finding the Fourth Proportional to 19,630.88, 27,090.88 and 10,678.64

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Solution

The fourth proportional to 19,630.88, 27,090.88 and 10,678.64 is: 14,736.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,630.88 : 27,090.88 = 10,678.64 : x
  2. Step 2: Convert to fraction form
    19,630.88/27,090.88 = 10,678.64/x
  3. Step 3: Cross multiply
    19,630.88x = 27,090.88 × 10,678.64
  4. Step 4: Simplify right side
    19,630.88x = 289,293,754.80
  5. Step 5: Solve for x
    x = 289,293,754.80/19,630.88
  6. Step 6: Final answer
    x = 14,736.67

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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.