Home / 47,930.45-71,896.13-12,870.11

Finding the Fourth Proportional to 47,930.45, 71,896.13 and 12,870.11

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Solution

The fourth proportional to 47,930.45, 71,896.13 and 12,870.11 is: 19,305.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,930.45 : 71,896.13 = 12,870.11 : x
  2. Step 2: Convert to fraction form
    47,930.45/71,896.13 = 12,870.11/x
  3. Step 3: Cross multiply
    47,930.45x = 71,896.13 × 12,870.11
  4. Step 4: Simplify right side
    47,930.45x = 925,310,677.84
  5. Step 5: Solve for x
    x = 925,310,677.84/47,930.45
  6. Step 6: Final answer
    x = 19,305.28

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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.