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Finding the Fourth Proportional to 47,960.16, 71,930.16 and 12,900.12

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Solution

The fourth proportional to 47,960.16, 71,930.16 and 12,900.12 is: 19,347.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,960.16 : 71,930.16 = 12,900.12 : x
  2. Step 2: Convert to fraction form
    47,960.16/71,930.16 = 12,900.12/x
  3. Step 3: Cross multiply
    47,960.16x = 71,930.16 × 12,900.12
  4. Step 4: Simplify right side
    47,960.16x = 927,907,695.62
  5. Step 5: Solve for x
    x = 927,907,695.62/47,960.16
  6. Step 6: Final answer
    x = 19,347.47

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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.