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Finding the Fourth Proportional to 21,998.34, 30,354.12 and 12,437.88

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Solution

The fourth proportional to 21,998.34, 30,354.12 and 12,437.88 is: 17,162.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,998.34 : 30,354.12 = 12,437.88 : x
  2. Step 2: Convert to fraction form
    21,998.34/30,354.12 = 12,437.88/x
  3. Step 3: Cross multiply
    21,998.34x = 30,354.12 × 12,437.88
  4. Step 4: Simplify right side
    21,998.34x = 377,540,902.07
  5. Step 5: Solve for x
    x = 377,540,902.07/21,998.34
  6. Step 6: Final answer
    x = 17,162.25

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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.