Home / 47,940.80-71,885.87-21,275.20

Finding the Fourth Proportional to 47,940.80, 71,885.87 and 21,275.20

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Solution

The fourth proportional to 47,940.80, 71,885.87 and 21,275.20 is: 31,901.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,940.80 : 71,885.87 = 21,275.20 : x
  2. Step 2: Convert to fraction form
    47,940.80/71,885.87 = 21,275.20/x
  3. Step 3: Cross multiply
    47,940.80x = 71,885.87 × 21,275.20
  4. Step 4: Simplify right side
    47,940.80x = 1,529,385,975.33
  5. Step 5: Solve for x
    x = 1,529,385,975.33/47,940.80
  6. Step 6: Final answer
    x = 31,901.56

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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.