Home / 12,800.21-19,205.82-4,905.14

Finding the Fourth Proportional to 12,800.21, 19,205.82 and 4,905.14

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Solution

The fourth proportional to 12,800.21, 19,205.82 and 4,905.14 is: 7,359.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,800.21 : 19,205.82 = 4,905.14 : x
  2. Step 2: Convert to fraction form
    12,800.21/19,205.82 = 4,905.14/x
  3. Step 3: Cross multiply
    12,800.21x = 19,205.82 × 4,905.14
  4. Step 4: Simplify right side
    12,800.21x = 94,207,235.91
  5. Step 5: Solve for x
    x = 94,207,235.91/12,800.21
  6. Step 6: Final answer
    x = 7,359.82

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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.