Home / 20,427.98-30,631.88-11,996.60

Finding the Fourth Proportional to 20,427.98, 30,631.88 and 11,996.60

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Solution

The fourth proportional to 20,427.98, 30,631.88 and 11,996.60 is: 17,988.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,427.98 : 30,631.88 = 11,996.60 : x
  2. Step 2: Convert to fraction form
    20,427.98/30,631.88 = 11,996.60/x
  3. Step 3: Cross multiply
    20,427.98x = 30,631.88 × 11,996.60
  4. Step 4: Simplify right side
    20,427.98x = 367,478,411.61
  5. Step 5: Solve for x
    x = 367,478,411.61/20,427.98
  6. Step 6: Final answer
    x = 17,988.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.