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Finding the Fourth Proportional to 21,999, 30,346.20 and 13,037.70

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Solution

The fourth proportional to 21,999, 30,346.20 and 13,037.70 is: 17,984.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,999 : 30,346.20 = 13,037.70 : x
  2. Step 2: Convert to fraction form
    21,999/30,346.20 = 13,037.70/x
  3. Step 3: Cross multiply
    21,999x = 30,346.20 × 13,037.70
  4. Step 4: Simplify right side
    21,999x = 395,644,651.74
  5. Step 5: Solve for x
    x = 395,644,651.74/21,999
  6. Step 6: Final answer
    x = 17,984.67

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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.