Home / 47,970.81-71,972.15-21,313.09

Finding the Fourth Proportional to 47,970.81, 71,972.15 and 21,313.09

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Solution

The fourth proportional to 47,970.81, 71,972.15 and 21,313.09 is: 31,976.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,970.81 : 71,972.15 = 21,313.09 : x
  2. Step 2: Convert to fraction form
    47,970.81/71,972.15 = 21,313.09/x
  3. Step 3: Cross multiply
    47,970.81x = 71,972.15 × 21,313.09
  4. Step 4: Simplify right side
    47,970.81x = 1,533,948,910.44
  5. Step 5: Solve for x
    x = 1,533,948,910.44/47,970.81
  6. Step 6: Final answer
    x = 31,976.71

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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.