Home / 21,214.16-31,770.12-12,422.96

Finding the Fourth Proportional to 21,214.16, 31,770.12 and 12,422.96

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Solution

The fourth proportional to 21,214.16, 31,770.12 and 12,422.96 is: 18,604.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,214.16 : 31,770.12 = 12,422.96 : x
  2. Step 2: Convert to fraction form
    21,214.16/31,770.12 = 12,422.96/x
  3. Step 3: Cross multiply
    21,214.16x = 31,770.12 × 12,422.96
  4. Step 4: Simplify right side
    21,214.16x = 394,678,929.96
  5. Step 5: Solve for x
    x = 394,678,929.96/21,214.16
  6. Step 6: Final answer
    x = 18,604.50

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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.