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Finding the Fourth Proportional to 48,047.32, 72,072.80 and 12,986.99

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Solution

The fourth proportional to 48,047.32, 72,072.80 and 12,986.99 is: 19,480.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,047.32 : 72,072.80 = 12,986.99 : x
  2. Step 2: Convert to fraction form
    48,047.32/72,072.80 = 12,986.99/x
  3. Step 3: Cross multiply
    48,047.32x = 72,072.80 × 12,986.99
  4. Step 4: Simplify right side
    48,047.32x = 936,008,732.87
  5. Step 5: Solve for x
    x = 936,008,732.87/48,047.32
  6. Step 6: Final answer
    x = 19,480.98

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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.